diff --git a/webrtc/api/androidtests/src/org/webrtc/PeerConnectionTest.java b/webrtc/api/androidtests/src/org/webrtc/PeerConnectionTest.java
index bbaa152..ff98d7d 100644
--- a/webrtc/api/androidtests/src/org/webrtc/PeerConnectionTest.java
+++ b/webrtc/api/androidtests/src/org/webrtc/PeerConnectionTest.java
@@ -109,6 +109,9 @@
       }
     }
 
+    @Override
+    public void onIceCandidatesRemoved(IceCandidate[] candidates) {}
+
     public synchronized void setExpectedResolution(int width, int height) {
       expectedWidth = width;
       expectedHeight = height;
diff --git a/webrtc/api/java/jni/peerconnection_jni.cc b/webrtc/api/java/jni/peerconnection_jni.cc
index 2e3cb0a..d614ed6 100644
--- a/webrtc/api/java/jni/peerconnection_jni.cc
+++ b/webrtc/api/java/jni/peerconnection_jni.cc
@@ -56,6 +56,7 @@
 #include "webrtc/api/rtpreceiverinterface.h"
 #include "webrtc/api/rtpsenderinterface.h"
 #include "webrtc/api/videosourceinterface.h"
+#include "webrtc/api/webrtcsdp.h"
 #include "webrtc/base/bind.h"
 #include "webrtc/base/checks.h"
 #include "webrtc/base/event_tracer.h"
@@ -195,8 +196,8 @@
         "<init>", "(Ljava/lang/String;ILjava/lang/String;)V");
     jstring j_mid = JavaStringFromStdString(jni(), candidate->sdp_mid());
     jstring j_sdp = JavaStringFromStdString(jni(), sdp);
-    jobject j_candidate = jni()->NewObject(
-        candidate_class, ctor, j_mid, candidate->sdp_mline_index(), j_sdp);
+    jobject j_candidate = jni()->NewObject(candidate_class, ctor, j_mid,
+                                           candidate->sdp_mline_index(), j_sdp);
     CHECK_EXCEPTION(jni()) << "error during NewObject";
     jmethodID m = GetMethodID(jni(), *j_observer_class_,
                               "onIceCandidate", "(Lorg/webrtc/IceCandidate;)V");
@@ -204,6 +205,17 @@
     CHECK_EXCEPTION(jni()) << "error during CallVoidMethod";
   }
 
+  void OnIceCandidatesRemoved(
+      const std::vector<cricket::Candidate>& candidates) {
+    ScopedLocalRefFrame local_ref_frame(jni());
+    jobjectArray candidates_array = ToJavaCandidateArray(jni(), candidates);
+    jmethodID m =
+        GetMethodID(jni(), *j_observer_class_, "onIceCandidatesRemoved",
+                    "([Lorg/webrtc/IceCandidate;)V");
+    jni()->CallVoidMethod(*j_observer_global_, m, candidates_array);
+    CHECK_EXCEPTION(jni()) << "Error during CallVoidMethod";
+  }
+
   void OnSignalingChange(
       PeerConnectionInterface::SignalingState new_state) override {
     ScopedLocalRefFrame local_ref_frame(jni());
@@ -371,6 +383,36 @@
     DeleteGlobalRef(jni(), j_stream);
   }
 
+  jobject ToJavaCandidate(JNIEnv* jni,
+                          jclass* candidate_class,
+                          const cricket::Candidate& candidate) {
+    std::string sdp = webrtc::SdpSerializeCandidate(candidate);
+    RTC_CHECK(!sdp.empty()) << "got an empty ICE candidate";
+    jmethodID ctor = GetMethodID(jni, *candidate_class, "<init>",
+                                 "(Ljava/lang/String;ILjava/lang/String;)V");
+    jstring j_mid = JavaStringFromStdString(jni, candidate.transport_name());
+    jstring j_sdp = JavaStringFromStdString(jni, sdp);
+    // sdp_mline_index is not used, pass an invalid value -1.
+    jobject j_candidate =
+        jni->NewObject(*candidate_class, ctor, j_mid, -1, j_sdp);
+    CHECK_EXCEPTION(jni) << "error during Java Candidate NewObject";
+    return j_candidate;
+  }
+
+  jobjectArray ToJavaCandidateArray(
+      JNIEnv* jni,
+      const std::vector<cricket::Candidate>& candidates) {
+    jclass candidate_class = FindClass(jni, "org/webrtc/IceCandidate");
+    jobjectArray java_candidates =
+        jni->NewObjectArray(candidates.size(), candidate_class, NULL);
+    int i = 0;
+    for (const cricket::Candidate& candidate : candidates) {
+      jobject j_candidate = ToJavaCandidate(jni, &candidate_class, candidate);
+      jni->SetObjectArrayElement(java_candidates, i++, j_candidate);
+    }
+    return java_candidates;
+  }
+
   JNIEnv* jni() {
     return AttachCurrentThreadIfNeeded();
   }
@@ -1718,6 +1760,35 @@
   return ExtractNativePC(jni, j_pc)->AddIceCandidate(candidate.get());
 }
 
+static cricket::Candidate GetCandidateFromJava(JNIEnv* jni,
+                                               jobject j_candidate) {
+  jclass j_candidate_class = GetObjectClass(jni, j_candidate);
+  jfieldID j_sdp_mid_id =
+      GetFieldID(jni, j_candidate_class, "sdpMid", "Ljava/lang/String;");
+  std::string sdp_mid =
+      JavaToStdString(jni, GetStringField(jni, j_candidate, j_sdp_mid_id));
+  jfieldID j_sdp_id =
+      GetFieldID(jni, j_candidate_class, "sdp", "Ljava/lang/String;");
+  std::string sdp =
+      JavaToStdString(jni, GetStringField(jni, j_candidate, j_sdp_id));
+  cricket::Candidate candidate;
+  if (!webrtc::SdpDeserializeCandidate(sdp_mid, sdp, &candidate, NULL)) {
+    LOG(LS_ERROR) << "SdpDescrializeCandidate failed with sdp " << sdp;
+  }
+  return candidate;
+}
+
+JOW(jboolean, PeerConnection_nativeRemoveIceCandidates)
+(JNIEnv* jni, jobject j_pc, jobjectArray j_candidates) {
+  std::vector<cricket::Candidate> candidates;
+  size_t num_candidates = jni->GetArrayLength(j_candidates);
+  for (size_t i = 0; i < num_candidates; ++i) {
+    jobject j_candidate = jni->GetObjectArrayElement(j_candidates, i);
+    candidates.push_back(GetCandidateFromJava(jni, j_candidate));
+  }
+  return ExtractNativePC(jni, j_pc)->RemoveIceCandidates(candidates);
+}
+
 JOW(jboolean, PeerConnection_nativeAddLocalStream)(
     JNIEnv* jni, jobject j_pc, jlong native_stream) {
   return ExtractNativePC(jni, j_pc)->AddStream(
diff --git a/webrtc/api/java/src/org/webrtc/PeerConnection.java b/webrtc/api/java/src/org/webrtc/PeerConnection.java
index 3c9fa0e..5f52619 100644
--- a/webrtc/api/java/src/org/webrtc/PeerConnection.java
+++ b/webrtc/api/java/src/org/webrtc/PeerConnection.java
@@ -58,6 +58,9 @@
     /** Triggered when a new ICE candidate has been found. */
     public void onIceCandidate(IceCandidate candidate);
 
+    /** Triggered when some ICE candidates have been removed. */
+    public void onIceCandidatesRemoved(IceCandidate[] candidates);
+
     /** Triggered when media is received on a new stream from remote peer. */
     public void onAddStream(MediaStream stream);
 
@@ -193,6 +196,10 @@
         candidate.sdpMid, candidate.sdpMLineIndex, candidate.sdp);
   }
 
+  public boolean removeIceCandidates(final IceCandidate[] candidates) {
+    return nativeRemoveIceCandidates(candidates);
+  }
+
   public boolean addStream(MediaStream stream) {
     boolean ret = nativeAddLocalStream(stream.nativeStream);
     if (!ret) {
@@ -273,6 +280,8 @@
   private native boolean nativeAddIceCandidate(
       String sdpMid, int sdpMLineIndex, String iceCandidateSdp);
 
+  private native boolean nativeRemoveIceCandidates(final IceCandidate[] candidates);
+
   private native boolean nativeAddLocalStream(long nativeStream);
 
   private native void nativeRemoveLocalStream(long nativeStream);
diff --git a/webrtc/api/jsep.h b/webrtc/api/jsep.h
index 0673ce1..e11a2ad 100644
--- a/webrtc/api/jsep.h
+++ b/webrtc/api/jsep.h
@@ -20,8 +20,8 @@
 #include "webrtc/base/refcount.h"
 
 namespace cricket {
-class SessionDescription;
 class Candidate;
+class SessionDescription;
 }  // namespace cricket
 
 namespace webrtc {
@@ -95,6 +95,11 @@
   // Returns false if the session description does not have a media section that
   // corresponds to the |candidate| label.
   virtual bool AddCandidate(const IceCandidateInterface* candidate) = 0;
+  // Removes the candidates from the description.
+  // Returns the number of candidates removed.
+  virtual size_t RemoveCandidates(
+      const std::vector<cricket::Candidate>& candidates) { return 0; }
+
   // Returns the number of m- lines in the session description.
   virtual size_t number_of_mediasections() const = 0;
   // Returns a collection of all candidates that belong to a certain m-line
diff --git a/webrtc/api/jsepicecandidate.cc b/webrtc/api/jsepicecandidate.cc
index 2aabcb8..cced1b4 100644
--- a/webrtc/api/jsepicecandidate.cc
+++ b/webrtc/api/jsepicecandidate.cc
@@ -79,4 +79,17 @@
   return ret;
 }
 
+size_t JsepCandidateCollection::remove(const cricket::Candidate& candidate) {
+  auto iter = std::find_if(candidates_.begin(), candidates_.end(),
+                           [candidate](JsepIceCandidate* c) {
+                             return candidate.MatchesForRemoval(c->candidate());
+                           });
+  if (iter != candidates_.end()) {
+    delete *iter;
+    candidates_.erase(iter);
+    return 1;
+  }
+  return 0;
+}
+
 }  // namespace webrtc
diff --git a/webrtc/api/jsepicecandidate.h b/webrtc/api/jsepicecandidate.h
index 529b2a7..7e9500b 100644
--- a/webrtc/api/jsepicecandidate.h
+++ b/webrtc/api/jsepicecandidate.h
@@ -70,6 +70,9 @@
   virtual const IceCandidateInterface* at(size_t index) const {
     return candidates_[index];
   }
+  // Removes the candidate that has a matching address and protocol.
+  // Returns the number of candidates that were removed.
+  size_t remove(const cricket::Candidate& candidate);
 
  private:
   std::vector<JsepIceCandidate*> candidates_;
diff --git a/webrtc/api/jsepsessiondescription.cc b/webrtc/api/jsepsessiondescription.cc
index b47114b..eb776c8 100644
--- a/webrtc/api/jsepsessiondescription.cc
+++ b/webrtc/api/jsepsessiondescription.cc
@@ -137,6 +137,20 @@
   return true;
 }
 
+size_t JsepSessionDescription::RemoveCandidates(
+    const std::vector<cricket::Candidate>& candidates) {
+  size_t num_removed = 0;
+  for (auto& candidate : candidates) {
+    int mediasection_index = GetMediasectionIndex(candidate);
+    if (mediasection_index < 0) {
+      // Not found.
+      continue;
+    }
+    num_removed += candidate_collection_[mediasection_index].remove(candidate);
+  }
+  return num_removed;
+}
+
 size_t JsepSessionDescription::number_of_mediasections() const {
   if (!description_)
     return 0;
@@ -184,4 +198,16 @@
   return true;
 }
 
+int JsepSessionDescription::GetMediasectionIndex(
+    const cricket::Candidate& candidate) {
+  // Find the description with a matching transport name of the candidate.
+  const std::string& transport_name = candidate.transport_name();
+  for (size_t i = 0; i < description_->contents().size(); ++i) {
+    if (transport_name == description_->contents().at(i).name) {
+      return static_cast<int>(i);
+    }
+  }
+  return -1;
+}
+
 }  // namespace webrtc
diff --git a/webrtc/api/jsepsessiondescription.h b/webrtc/api/jsepsessiondescription.h
index 244ee19..9a0d873 100644
--- a/webrtc/api/jsepsessiondescription.h
+++ b/webrtc/api/jsepsessiondescription.h
@@ -19,6 +19,7 @@
 #include "webrtc/api/jsep.h"
 #include "webrtc/api/jsepicecandidate.h"
 #include "webrtc/base/scoped_ptr.h"
+#include "webrtc/p2p/base/candidate.h"
 
 namespace cricket {
 class SessionDescription;
@@ -57,6 +58,8 @@
   // Allow changing the type. Used for testing.
   void set_type(const std::string& type) { type_ = type; }
   virtual bool AddCandidate(const IceCandidateInterface* candidate);
+  virtual size_t RemoveCandidates(
+      const std::vector<cricket::Candidate>& candidates);
   virtual size_t number_of_mediasections() const;
   virtual const IceCandidateCollection* candidates(
       size_t mediasection_index) const;
@@ -80,6 +83,7 @@
 
   bool GetMediasectionIndex(const IceCandidateInterface* candidate,
                             size_t* index);
+  int GetMediasectionIndex(const cricket::Candidate& candidate);
 
   RTC_DISALLOW_COPY_AND_ASSIGN(JsepSessionDescription);
 };
diff --git a/webrtc/api/jsepsessiondescription_unittest.cc b/webrtc/api/jsepsessiondescription_unittest.cc
index 7868bea..3d87513 100644
--- a/webrtc/api/jsepsessiondescription_unittest.cc
+++ b/webrtc/api/jsepsessiondescription_unittest.cc
@@ -109,7 +109,7 @@
   EXPECT_EQ(2u, jsep_desc_->number_of_mediasections());
 }
 
-// Test that we can add a candidate to a session description.
+// Test that we can add a candidate to a session description without MID.
 TEST_F(JsepSessionDescriptionTest, AddCandidateWithoutMid) {
   JsepIceCandidate jsep_candidate("", 0, candidate_);
   EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
@@ -125,9 +125,12 @@
   EXPECT_EQ(0u, jsep_desc_->candidates(1)->count());
 }
 
-TEST_F(JsepSessionDescriptionTest, AddCandidateWithMid) {
+// Test that we can add and remove candidates to a session description with
+// MID. Removing candidates requires MID (transport_name).
+TEST_F(JsepSessionDescriptionTest, AddAndRemoveCandidatesWithMid) {
   // mid and m-line index don't match, in this case mid is preferred.
-  JsepIceCandidate jsep_candidate("video", 0, candidate_);
+  std::string mid = "video";
+  JsepIceCandidate jsep_candidate(mid, 0, candidate_);
   EXPECT_TRUE(jsep_desc_->AddCandidate(&jsep_candidate));
   EXPECT_EQ(0u, jsep_desc_->candidates(0)->count());
   const IceCandidateCollection* ice_candidates = jsep_desc_->candidates(1);
@@ -140,6 +143,12 @@
   EXPECT_TRUE(ice_candidate->candidate().IsEquivalent(candidate_));
   // The mline index should have been updated according to mid.
   EXPECT_EQ(1, ice_candidate->sdp_mline_index());
+
+  std::vector<cricket::Candidate> candidates(1, candidate_);
+  candidates[0].set_transport_name(mid);
+  EXPECT_EQ(1u, jsep_desc_->RemoveCandidates(candidates));
+  EXPECT_EQ(0u, jsep_desc_->candidates(0)->count());
+  EXPECT_EQ(0u, jsep_desc_->candidates(1)->count());
 }
 
 TEST_F(JsepSessionDescriptionTest, AddCandidateAlreadyHasUfrag) {
diff --git a/webrtc/api/peerconnection.cc b/webrtc/api/peerconnection.cc
index e4ab40e..54e76d4 100644
--- a/webrtc/api/peerconnection.cc
+++ b/webrtc/api/peerconnection.cc
@@ -1205,6 +1205,12 @@
   return session_->ProcessIceMessage(ice_candidate);
 }
 
+bool PeerConnection::RemoveIceCandidates(
+    const std::vector<cricket::Candidate>& candidates) {
+  TRACE_EVENT0("webrtc", "PeerConnection::RemoveIceCandidates");
+  return session_->RemoveRemoteIceCandidates(candidates);
+}
+
 void PeerConnection::RegisterUMAObserver(UMAObserver* observer) {
   TRACE_EVENT0("webrtc", "PeerConnection::RegisterUmaObserver");
   uma_observer_ = observer;
@@ -1384,6 +1390,12 @@
   observer_->OnIceCandidate(candidate);
 }
 
+void PeerConnection::OnIceCandidatesRemoved(
+    const std::vector<cricket::Candidate>& candidates) {
+  RTC_DCHECK(signaling_thread()->IsCurrent());
+  observer_->OnIceCandidatesRemoved(candidates);
+}
+
 void PeerConnection::OnIceConnectionReceivingChange(bool receiving) {
   RTC_DCHECK(signaling_thread()->IsCurrent());
   observer_->OnIceConnectionReceivingChange(receiving);
diff --git a/webrtc/api/peerconnection.h b/webrtc/api/peerconnection.h
index 3b0d558..d715ecd 100644
--- a/webrtc/api/peerconnection.h
+++ b/webrtc/api/peerconnection.h
@@ -132,6 +132,8 @@
   bool SetConfiguration(
       const PeerConnectionInterface::RTCConfiguration& config) override;
   bool AddIceCandidate(const IceCandidateInterface* candidate) override;
+  bool RemoveIceCandidates(
+      const std::vector<cricket::Candidate>& candidates) override;
 
   void RegisterUMAObserver(UMAObserver* observer) override;
 
@@ -187,6 +189,8 @@
   void OnIceConnectionChange(IceConnectionState new_state) override;
   void OnIceGatheringChange(IceGatheringState new_state) override;
   void OnIceCandidate(const IceCandidateInterface* candidate) override;
+  void OnIceCandidatesRemoved(
+      const std::vector<cricket::Candidate>& candidates) override;
   void OnIceConnectionReceivingChange(bool receiving) override;
 
   // Signals from WebRtcSession.
diff --git a/webrtc/api/peerconnectioninterface.h b/webrtc/api/peerconnectioninterface.h
index f6c8cba..22109c4 100644
--- a/webrtc/api/peerconnectioninterface.h
+++ b/webrtc/api/peerconnectioninterface.h
@@ -439,6 +439,12 @@
   // take the ownership of the |candidate|.
   virtual bool AddIceCandidate(const IceCandidateInterface* candidate) = 0;
 
+  // Removes a group of remote candidates from the ICE agent.
+  virtual bool RemoveIceCandidates(
+      const std::vector<cricket::Candidate>& candidates) {
+    return false;
+  }
+
   virtual void RegisterUMAObserver(UMAObserver* observer) = 0;
 
   // Returns the current SignalingState.
@@ -495,6 +501,12 @@
   // New Ice candidate have been found.
   virtual void OnIceCandidate(const IceCandidateInterface* candidate) = 0;
 
+  // Ice candidates have been removed.
+  // TODO(honghaiz): Make this a pure virtual method when all its subclasses
+  // implement it.
+  virtual void OnIceCandidatesRemoved(
+      const std::vector<cricket::Candidate>& candidates) {}
+
   // Called when the ICE connection receiving status changes.
   virtual void OnIceConnectionReceivingChange(bool receiving) {}
 
diff --git a/webrtc/api/peerconnectionproxy.h b/webrtc/api/peerconnectionproxy.h
index e47bc96..1183e61 100644
--- a/webrtc/api/peerconnectionproxy.h
+++ b/webrtc/api/peerconnectionproxy.h
@@ -66,6 +66,9 @@
                 SetConfiguration,
                 const PeerConnectionInterface::RTCConfiguration&);
   PROXY_METHOD1(bool, AddIceCandidate, const IceCandidateInterface*)
+  PROXY_METHOD1(bool,
+                RemoveIceCandidates,
+                const std::vector<cricket::Candidate>&);
   PROXY_METHOD1(void, RegisterUMAObserver, UMAObserver*)
   PROXY_METHOD0(SignalingState, signaling_state)
   PROXY_METHOD0(IceState, ice_state)
diff --git a/webrtc/api/webrtcsdp.cc b/webrtc/api/webrtcsdp.cc
index 54bb059..4a296d9 100644
--- a/webrtc/api/webrtcsdp.cc
+++ b/webrtc/api/webrtcsdp.cc
@@ -154,8 +154,7 @@
 // Candidate
 static const char kCandidateHost[] = "host";
 static const char kCandidateSrflx[] = "srflx";
-// TODO: How to map the prflx with circket candidate type
-// static const char kCandidatePrflx[] = "prflx";
+static const char kCandidatePrflx[] = "prflx";
 static const char kCandidateRelay[] = "relay";
 static const char kTcpCandidateType[] = "tcptype";
 
@@ -871,11 +870,14 @@
 
 // Serializes the passed in IceCandidateInterface to a SDP string.
 // candidate - The candidate to be serialized.
-std::string SdpSerializeCandidate(
-    const IceCandidateInterface& candidate) {
+std::string SdpSerializeCandidate(const IceCandidateInterface& candidate) {
+  return SdpSerializeCandidate(candidate.candidate());
+}
+
+// Serializes a cricket Candidate.
+std::string SdpSerializeCandidate(const cricket::Candidate& candidate) {
   std::string message;
-  std::vector<cricket::Candidate> candidates;
-  candidates.push_back(candidate.candidate());
+  std::vector<cricket::Candidate> candidates(1, candidate);
   BuildCandidate(candidates, true, &message);
   // From WebRTC draft section 4.8.1.1 candidate-attribute will be
   // just candidate:<candidate> not a=candidate:<blah>CRLF
@@ -938,6 +940,18 @@
   return true;
 }
 
+bool SdpDeserializeCandidate(const std::string& transport_name,
+                             const std::string& message,
+                             cricket::Candidate* candidate,
+                             SdpParseError* error) {
+  ASSERT(candidate != nullptr);
+  if (!ParseCandidate(message, candidate, error, true)) {
+    return false;
+  }
+  candidate->set_transport_name(transport_name);
+  return true;
+}
+
 bool ParseCandidate(const std::string& message, Candidate* candidate,
                     SdpParseError* error, bool is_raw) {
   ASSERT(candidate != NULL);
@@ -1026,6 +1040,8 @@
     candidate_type = cricket::STUN_PORT_TYPE;
   } else if (type == kCandidateRelay) {
     candidate_type = cricket::RELAY_PORT_TYPE;
+  } else if (type == kCandidatePrflx) {
+    candidate_type = cricket::PRFLX_PORT_TYPE;
   } else {
     return ParseFailed(first_line, "Unsupported candidate type.", error);
   }
@@ -1761,6 +1777,9 @@
       type = kCandidateSrflx;
     } else if (it->type() == cricket::RELAY_PORT_TYPE) {
       type = kCandidateRelay;
+    } else if (it->type() == cricket::PRFLX_PORT_TYPE) {
+      type = kCandidatePrflx;
+      // Peer reflexive candidate may be signaled for being removed.
     } else {
       ASSERT(false);
       // Never write out candidates if we don't know the type.
diff --git a/webrtc/api/webrtcsdp.h b/webrtc/api/webrtcsdp.h
index 2b22b62..e7fdb34 100644
--- a/webrtc/api/webrtcsdp.h
+++ b/webrtc/api/webrtcsdp.h
@@ -22,8 +22,11 @@
 
 #include <string>
 
-namespace webrtc {
+namespace cricket {
+class Candidate;
+}  // namespace cricket
 
+namespace webrtc {
 class IceCandidateInterface;
 class JsepIceCandidate;
 class JsepSessionDescription;
@@ -42,6 +45,10 @@
 // candidate - The candidate to be serialized.
 std::string SdpSerializeCandidate(const IceCandidateInterface& candidate);
 
+// Serializes a cricket Candidate.
+// candidate - The candidate to be serialized.
+std::string SdpSerializeCandidate(const cricket::Candidate& candidate);
+
 // Deserializes the passed in SDP string to a JsepSessionDescription.
 // message - SDP string to be Deserialized.
 // jdesc - The JsepSessionDescription deserialized from the SDP string.
@@ -61,6 +68,20 @@
 bool SdpDeserializeCandidate(const std::string& message,
                              JsepIceCandidate* candidate,
                              SdpParseError* error);
+
+// Deserializes the passed in SDP string to a cricket Candidate.
+// The first line must be a=candidate line and only the first line will be
+// parsed.
+// transport_name - The transport name (MID) of the candidate.
+// message - The SDP string to be deserialized.
+// candidate - The cricket Candidate from the SDP string.
+// error - The detail error information when parsing fails.
+// return - true on success, false on failure.
+bool SdpDeserializeCandidate(const std::string& transport_name,
+                             const std::string& message,
+                             cricket::Candidate* candidate,
+                             SdpParseError* error);
+
 }  // namespace webrtc
 
 #endif  // WEBRTC_API_WEBRTCSDP_H_
diff --git a/webrtc/api/webrtcsession.cc b/webrtc/api/webrtcsession.cc
index 9ed5640..3d9b6fb 100644
--- a/webrtc/api/webrtcsession.cc
+++ b/webrtc/api/webrtcsession.cc
@@ -501,6 +501,8 @@
       this, &WebRtcSession::OnTransportControllerGatheringState);
   transport_controller_->SignalCandidatesGathered.connect(
       this, &WebRtcSession::OnTransportControllerCandidatesGathered);
+  transport_controller_->SignalCandidatesRemoved.connect(
+      this, &WebRtcSession::OnTransportControllerCandidatesRemoved);
 }
 
 WebRtcSession::~WebRtcSession() {
@@ -1086,7 +1088,7 @@
   if (!remote_desc_) {
     LOG(LS_ERROR) << "ProcessIceMessage: ICE candidates can't be added "
                   << "without any remote session description.";
-     return false;
+    return false;
   }
 
   if (!candidate) {
@@ -1114,6 +1116,35 @@
   }
 }
 
+bool WebRtcSession::RemoveRemoteIceCandidates(
+    const std::vector<cricket::Candidate>& candidates) {
+  if (!remote_desc_) {
+    LOG(LS_ERROR) << "RemoveRemoteIceCandidates: ICE candidates can't be "
+                  << "removed without any remote session description.";
+    return false;
+  }
+
+  if (candidates.empty()) {
+    LOG(LS_ERROR) << "RemoveRemoteIceCandidates: candidates are empty.";
+    return false;
+  }
+
+  size_t number_removed = remote_desc_->RemoveCandidates(candidates);
+  if (number_removed != candidates.size()) {
+    LOG(LS_ERROR) << "RemoveRemoteIceCandidates: Failed to remove candidates. "
+                  << "Requested " << candidates.size() << " but only "
+                  << number_removed << " are removed.";
+  }
+
+  // Remove the candidates from the transport controller.
+  std::string error;
+  bool res = transport_controller_->RemoveRemoteCandidates(candidates, &error);
+  if (!res && !error.empty()) {
+    LOG(LS_ERROR) << "Error when removing remote candidates: " << error;
+  }
+  return true;
+}
+
 bool WebRtcSession::SetIceTransports(
     PeerConnectionInterface::IceTransportsType type) {
   return port_allocator()->set_candidate_filter(
@@ -1523,6 +1554,27 @@
   }
 }
 
+void WebRtcSession::OnTransportControllerCandidatesRemoved(
+    const std::vector<cricket::Candidate>& candidates) {
+  ASSERT(signaling_thread()->IsCurrent());
+  // Sanity check.
+  for (const cricket::Candidate& candidate : candidates) {
+    if (candidate.transport_name().empty()) {
+      LOG(LS_ERROR) << "OnTransportControllerCandidatesRemoved: "
+                    << "empty content name in candidate "
+                    << candidate.ToString();
+      return;
+    }
+  }
+
+  if (local_desc_) {
+    local_desc_->RemoveCandidates(candidates);
+  }
+  if (ice_observer_) {
+    ice_observer_->OnIceCandidatesRemoved(candidates);
+  }
+}
+
 // Enabling voice and video channel.
 void WebRtcSession::EnableChannels() {
   if (voice_channel_ && !voice_channel_->enabled())
@@ -1582,14 +1634,11 @@
   return ret;
 }
 
-bool WebRtcSession::UseCandidate(
-    const IceCandidateInterface* candidate) {
-
+bool WebRtcSession::UseCandidate(const IceCandidateInterface* candidate) {
   size_t mediacontent_index = static_cast<size_t>(candidate->sdp_mline_index());
   size_t remote_content_size = remote_desc_->description()->contents().size();
   if (mediacontent_index >= remote_content_size) {
-    LOG(LS_ERROR)
-        << "UseRemoteCandidateInSession: Invalid candidate media index.";
+    LOG(LS_ERROR) << "UseCandidate: Invalid candidate media index.";
     return false;
   }
 
@@ -1930,8 +1979,8 @@
   size_t remote_content_size =
       current_remote_desc->description()->contents().size();
   if (mediacontent_index >= remote_content_size) {
-    LOG(LS_ERROR)
-        << "ReadyToUseRemoteCandidate: Invalid candidate media index.";
+    LOG(LS_ERROR) << "ReadyToUseRemoteCandidate: Invalid candidate media index "
+                  << mediacontent_index;
 
     *valid = false;
     return false;
diff --git a/webrtc/api/webrtcsession.h b/webrtc/api/webrtcsession.h
index 27472c9..9495116 100644
--- a/webrtc/api/webrtcsession.h
+++ b/webrtc/api/webrtcsession.h
@@ -25,6 +25,7 @@
 #include "webrtc/base/sslidentity.h"
 #include "webrtc/base/thread.h"
 #include "webrtc/media/base/mediachannel.h"
+#include "webrtc/p2p/base/candidate.h"
 #include "webrtc/p2p/base/transportcontroller.h"
 #include "webrtc/pc/mediasession.h"
 
@@ -81,6 +82,10 @@
   // New Ice candidate have been found.
   virtual void OnIceCandidate(const IceCandidateInterface* candidate) = 0;
 
+  // Some local ICE candidates have been removed.
+  virtual void OnIceCandidatesRemoved(
+      const std::vector<cricket::Candidate>& candidates) = 0;
+
   // Called whenever the state changes between receiving and not receiving.
   virtual void OnIceConnectionReceivingChange(bool receiving) {}
 
@@ -205,6 +210,9 @@
                             std::string* err_desc);
   bool ProcessIceMessage(const IceCandidateInterface* ice_candidate);
 
+  bool RemoveRemoteIceCandidates(
+      const std::vector<cricket::Candidate>& candidates);
+
   bool SetIceTransports(PeerConnectionInterface::IceTransportsType type);
 
   cricket::IceConfig ParseIceConfig(
@@ -431,7 +439,9 @@
   void OnTransportControllerGatheringState(cricket::IceGatheringState state);
   void OnTransportControllerCandidatesGathered(
       const std::string& transport_name,
-      const cricket::Candidates& candidates);
+      const std::vector<cricket::Candidate>& candidates);
+  void OnTransportControllerCandidatesRemoved(
+      const std::vector<cricket::Candidate>& candidates);
 
   std::string GetSessionErrorMsg();
 
diff --git a/webrtc/api/webrtcsession_unittest.cc b/webrtc/api/webrtcsession_unittest.cc
index 2c9a99b..c0fff52 100644
--- a/webrtc/api/webrtcsession_unittest.cc
+++ b/webrtc/api/webrtcsession_unittest.cc
@@ -189,11 +189,18 @@
     EXPECT_NE(PeerConnectionInterface::kIceGatheringNew, ice_gathering_state_);
   }
 
+  // Some local candidates are removed.
+  void OnIceCandidatesRemoved(
+      const std::vector<cricket::Candidate>& candidates) {
+    num_candidates_removed_ += candidates.size();
+  }
+
   bool oncandidatesready_;
   std::vector<cricket::Candidate> mline_0_candidates_;
   std::vector<cricket::Candidate> mline_1_candidates_;
   PeerConnectionInterface::IceConnectionState ice_connection_state_;
   PeerConnectionInterface::IceGatheringState ice_gathering_state_;
+  size_t num_candidates_removed_ = 0;
 };
 
 class WebRtcSessionForTest : public webrtc::WebRtcSession {
@@ -358,6 +365,9 @@
   void AddInterface(const SocketAddress& addr) {
     network_manager_.AddInterface(addr);
   }
+  void RemoveInterface(const SocketAddress& addr) {
+    network_manager_.RemoveInterface(addr);
+  }
 
   // If |dtls_identity_store| != null or |rtc_configuration| contains
   // |certificates| then DTLS will be enabled unless explicitly disabled by
@@ -2106,12 +2116,14 @@
       "Called in wrong state: STATE_INIT", answer);
 }
 
-TEST_F(WebRtcSessionTest, TestAddRemoteCandidate) {
+// Tests that the remote candidates are added and removed successfully.
+TEST_F(WebRtcSessionTest, TestAddAndRemoveRemoteCandidates) {
   Init();
   SendAudioVideoStream1();
 
-  cricket::Candidate candidate;
-  candidate.set_component(1);
+  cricket::Candidate candidate(1, "udp", rtc::SocketAddress("1.1.1.1", 5000), 0,
+                               "", "", "host", 0, "");
+  candidate.set_transport_name("audio");
   JsepIceCandidate ice_candidate1(kMediaContentName0, 0, candidate);
 
   // Fail since we have not set a remote description.
@@ -2129,6 +2141,7 @@
 
   EXPECT_TRUE(session_->ProcessIceMessage(&ice_candidate1));
   candidate.set_component(2);
+  candidate.set_address(rtc::SocketAddress("2.2.2.2", 6000));
   JsepIceCandidate ice_candidate2(kMediaContentName0, 0, candidate);
   EXPECT_TRUE(session_->ProcessIceMessage(&ice_candidate2));
 
@@ -2154,9 +2167,16 @@
 
   JsepIceCandidate bad_ice_candidate("bad content name", 99, candidate);
   EXPECT_FALSE(session_->ProcessIceMessage(&bad_ice_candidate));
+
+  // Remove candidate1 and candidate2
+  std::vector<cricket::Candidate> remote_candidates;
+  remote_candidates.push_back(ice_candidate1.candidate());
+  remote_candidates.push_back(ice_candidate2.candidate());
+  EXPECT_TRUE(session_->RemoveRemoteIceCandidates(remote_candidates));
+  EXPECT_EQ(0u, candidates->count());
 }
 
-// Test that a remote candidate is added to the remote session description and
+// Tests that a remote candidate is added to the remote session description and
 // that it is retained if the remote session description is changed.
 TEST_F(WebRtcSessionTest, TestRemoteCandidatesAddedToSessionDescription) {
   Init();
@@ -2209,8 +2229,11 @@
 }
 
 // Test that local candidates are added to the local session description and
-// that they are retained if the local session description is changed.
-TEST_F(WebRtcSessionTest, TestLocalCandidatesAddedToSessionDescription) {
+// that they are retained if the local session description is changed. And if
+// continual gathering is enabled, they are removed from the local session
+// description when the network is down.
+TEST_F(WebRtcSessionTest,
+       TestLocalCandidatesAddedAndRemovedIfGatherContinually) {
   AddInterface(rtc::SocketAddress(kClientAddrHost1, kClientAddrPort));
   Init();
   SendAudioVideoStream1();
@@ -2243,6 +2266,43 @@
   candidates = local_desc->candidates(1);
   ASSERT_TRUE(candidates != NULL);
   EXPECT_EQ(0u, candidates->count());
+
+  candidates = local_desc->candidates(kMediaContentIndex0);
+  size_t num_local_candidates = candidates->count();
+  // Enable Continual Gathering
+  session_->SetIceConfig(cricket::IceConfig(-1, -1, true, false, -1));
+  // Bring down the network interface to trigger candidate removals.
+  RemoveInterface(rtc::SocketAddress(kClientAddrHost1, kClientAddrPort));
+  // Verify that all local candidates are removed.
+  EXPECT_EQ(0, observer_.num_candidates_removed_);
+  EXPECT_EQ_WAIT(num_local_candidates, observer_.num_candidates_removed_,
+                 kIceCandidatesTimeout);
+  EXPECT_EQ_WAIT(0u, candidates->count(), kIceCandidatesTimeout);
+}
+
+// Tests that if continual gathering is disabled, local candidates won't be
+// removed when the interface is turned down.
+TEST_F(WebRtcSessionTest, TestLocalCandidatesNotRemovedIfNotGatherContinually) {
+  AddInterface(rtc::SocketAddress(kClientAddrHost1, kClientAddrPort));
+  Init();
+  SendAudioVideoStream1();
+  CreateAndSetRemoteOfferAndLocalAnswer();
+
+  const SessionDescriptionInterface* local_desc = session_->local_description();
+  const IceCandidateCollection* candidates =
+      local_desc->candidates(kMediaContentIndex0);
+  ASSERT_TRUE(candidates != NULL);
+  EXPECT_TRUE_WAIT(observer_.oncandidatesready_, kIceCandidatesTimeout);
+
+  size_t num_local_candidates = candidates->count();
+  EXPECT_LT(0u, num_local_candidates);
+  // By default, Continual Gathering is disabled.
+  // Bring down the network interface.
+  RemoveInterface(rtc::SocketAddress(kClientAddrHost1, kClientAddrPort));
+  // Verify that the local candidates are not removed.
+  rtc::Thread::Current()->ProcessMessages(1000);
+  EXPECT_EQ(0, observer_.num_candidates_removed_);
+  EXPECT_EQ(num_local_candidates, candidates->count());
 }
 
 // Test that we can set a remote session description with remote candidates.
diff --git a/webrtc/examples/androidapp/src/org/appspot/apprtc/AppRTCClient.java b/webrtc/examples/androidapp/src/org/appspot/apprtc/AppRTCClient.java
index 195446a..f9cb67b 100644
--- a/webrtc/examples/androidapp/src/org/appspot/apprtc/AppRTCClient.java
+++ b/webrtc/examples/androidapp/src/org/appspot/apprtc/AppRTCClient.java
@@ -59,6 +59,11 @@
   public void sendLocalIceCandidate(final IceCandidate candidate);
 
   /**
+   * Send removed ICE candidates to the other participant.
+   */
+  public void sendLocalIceCandidateRemovals(final IceCandidate[] candidates);
+
+  /**
    * Disconnect from room.
    */
   public void disconnectFromRoom();
@@ -113,6 +118,11 @@
     public void onRemoteIceCandidate(final IceCandidate candidate);
 
     /**
+     * Callback fired once remote Ice candidate removals are received.
+     */
+    public void onRemoteIceCandidatesRemoved(final IceCandidate[] candidates);
+
+    /**
      * Callback fired once channel is closed.
      */
     public void onChannelClose();
diff --git a/webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java b/webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java
index e2f1306..b50935b 100644
--- a/webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java
+++ b/webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java
@@ -558,8 +558,7 @@
       @Override
       public void run() {
         if (peerConnectionClient == null) {
-          Log.e(TAG,
-              "Received ICE candidate for non-initilized peer connection.");
+          Log.e(TAG, "Received ICE candidate for a non-initialized peer connection.");
           return;
         }
         peerConnectionClient.addRemoteIceCandidate(candidate);
@@ -568,6 +567,20 @@
   }
 
   @Override
+  public void onRemoteIceCandidatesRemoved(final IceCandidate[] candidates) {
+    runOnUiThread(new Runnable() {
+      @Override
+      public void run() {
+        if (peerConnectionClient == null) {
+          Log.e(TAG, "Received ICE candidate removals for a non-initialized peer connection.");
+          return;
+        }
+        peerConnectionClient.removeRemoteIceCandidates(candidates);
+      }
+    });
+  }
+
+  @Override
   public void onChannelClose() {
     runOnUiThread(new Runnable() {
       @Override
@@ -618,6 +631,18 @@
   }
 
   @Override
+  public void onIceCandidatesRemoved(final IceCandidate[] candidates) {
+    runOnUiThread(new Runnable() {
+      @Override
+      public void run() {
+        if (appRtcClient != null) {
+          appRtcClient.sendLocalIceCandidateRemovals(candidates);
+        }
+      }
+    });
+  }
+
+  @Override
   public void onIceConnected() {
     final long delta = System.currentTimeMillis() - callStartedTimeMs;
     runOnUiThread(new Runnable() {
diff --git a/webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java b/webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java
index eb4d959..ecd0da4 100644
--- a/webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java
+++ b/webrtc/examples/androidapp/src/org/appspot/apprtc/PeerConnectionClient.java
@@ -184,6 +184,11 @@
     public void onIceCandidate(final IceCandidate candidate);
 
     /**
+     * Callback fired once local ICE candidates are removed.
+     */
+    public void onIceCandidatesRemoved(final IceCandidate[] candidates);
+
+    /**
      * Callback fired once connection is established (IceConnectionState is
      * CONNECTED).
      */
@@ -655,6 +660,21 @@
     });
   }
 
+  public void removeRemoteIceCandidates(final IceCandidate[] candidates) {
+    executor.execute(new Runnable() {
+      @Override
+      public void run() {
+        if (peerConnection == null || isError) {
+          return;
+        }
+        // Drain the queued remote candidates if there is any so that
+        // they are processed in the proper order.
+        drainCandidates();
+        peerConnection.removeIceCandidates(candidates);
+      }
+    });
+  }
+
   public void setRemoteDescription(final SessionDescription sdp) {
     executor.execute(new Runnable() {
       @Override
@@ -924,6 +944,16 @@
     }
 
     @Override
+    public void onIceCandidatesRemoved(final IceCandidate[] candidates) {
+      executor.execute(new Runnable() {
+        @Override
+        public void run() {
+          events.onIceCandidatesRemoved(candidates);
+        }
+      });
+    }
+
+    @Override
     public void onSignalingChange(
         PeerConnection.SignalingState newState) {
       Log.d(TAG, "SignalingState: " + newState);
diff --git a/webrtc/examples/androidapp/src/org/appspot/apprtc/WebSocketRTCClient.java b/webrtc/examples/androidapp/src/org/appspot/apprtc/WebSocketRTCClient.java
index ca319ab..258b22f 100644
--- a/webrtc/examples/androidapp/src/org/appspot/apprtc/WebSocketRTCClient.java
+++ b/webrtc/examples/androidapp/src/org/appspot/apprtc/WebSocketRTCClient.java
@@ -19,6 +19,7 @@
 
 import android.util.Log;
 
+import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
 import org.webrtc.IceCandidate;
@@ -252,6 +253,37 @@
     });
   }
 
+  // Send removed Ice candidates to the other participant.
+  @Override
+  public void sendLocalIceCandidateRemovals(final IceCandidate[] candidates) {
+    executor.execute(new Runnable() {
+      @Override
+      public void run() {
+        JSONObject json = new JSONObject();
+        jsonPut(json, "type", "remove-candidates");
+        JSONArray jsonArray =  new JSONArray();
+        for (final IceCandidate candidate : candidates) {
+          jsonArray.put(toJsonCandidate(candidate));
+        }
+        jsonPut(json, "candidates", jsonArray);
+        if (initiator) {
+          // Call initiator sends ice candidates to GAE server.
+          if (roomState != ConnectionState.CONNECTED) {
+            reportError("Sending ICE candidate removals in non connected state.");
+            return;
+          }
+          sendPostMessage(MessageType.MESSAGE, messageUrl, json.toString());
+          if (connectionParameters.loopback) {
+            events.onRemoteIceCandidatesRemoved(candidates);
+          }
+        } else {
+          // Call receiver sends ice candidates to websocket server.
+          wsClient.send(json.toString());
+        }
+      }
+    });
+  }
+
   // --------------------------------------------------------------------
   // WebSocketChannelEvents interface implementation.
   // All events are called by WebSocketChannelClient on a local looper thread
@@ -270,11 +302,14 @@
         json = new JSONObject(msgText);
         String type = json.optString("type");
         if (type.equals("candidate")) {
-          IceCandidate candidate = new IceCandidate(
-              json.getString("id"),
-              json.getInt("label"),
-              json.getString("candidate"));
-          events.onRemoteIceCandidate(candidate);
+          events.onRemoteIceCandidate(toJavaCandidate(json));
+        } else if (type.equals("remove-candidates")) {
+          JSONArray candidateArray = json.getJSONArray("candidates");
+          IceCandidate[] candidates = new IceCandidate[candidateArray.length()];
+          for (int i =0; i < candidateArray.length(); ++i) {
+            candidates[i] = toJavaCandidate(candidateArray.getJSONObject(i));
+          }
+          events.onRemoteIceCandidatesRemoved(candidates);
         } else if (type.equals("answer")) {
           if (initiator) {
             SessionDescription sdp = new SessionDescription(
@@ -376,4 +411,20 @@
       });
     httpConnection.send();
   }
+
+  // Converts a Java candidate to a JSONObject.
+  private JSONObject toJsonCandidate(final IceCandidate candidate) {
+    JSONObject json = new JSONObject();
+    jsonPut(json, "label", candidate.sdpMLineIndex);
+    jsonPut(json, "id", candidate.sdpMid);
+    jsonPut(json, "candidate", candidate.sdp);
+    return json;
+  }
+
+  // Converts a JSON candidate to a Java object.
+  IceCandidate toJavaCandidate(JSONObject json) throws JSONException {
+    return new IceCandidate(json.getString("id"),
+                            json.getInt("label"),
+                            json.getString("candidate"));
+  }
 }
diff --git a/webrtc/examples/androidtests/src/org/appspot/apprtc/test/PeerConnectionClientTest.java b/webrtc/examples/androidtests/src/org/appspot/apprtc/test/PeerConnectionClientTest.java
index 08f5b91..ca7c2f9 100644
--- a/webrtc/examples/androidtests/src/org/appspot/apprtc/test/PeerConnectionClientTest.java
+++ b/webrtc/examples/androidtests/src/org/appspot/apprtc/test/PeerConnectionClientTest.java
@@ -150,6 +150,11 @@
   }
 
   @Override
+  public void onIceCandidatesRemoved(final IceCandidate[] candidates) {
+    // TODO(honghaiz): Add this for tests.
+  }
+
+  @Override
   public void onIceConnected() {
     Log.d(TAG, "ICE Connected");
     synchronized(iceConnectedEvent) {
diff --git a/webrtc/p2p/base/candidate.h b/webrtc/p2p/base/candidate.h
index afea2a2..11481cd 100644
--- a/webrtc/p2p/base/candidate.h
+++ b/webrtc/p2p/base/candidate.h
@@ -169,6 +169,12 @@
     tcptype_ = tcptype;
   }
 
+  // The name of the transport channel of this candidate.
+  const std::string& transport_name() const { return transport_name_; }
+  void set_transport_name(const std::string& transport_name) {
+    transport_name_ = transport_name;
+  }
+
   // Determines whether this candidate is equivalent to the given one.
   bool IsEquivalent(const Candidate& c) const {
     // We ignore the network name, since that is just debug information, and
@@ -181,6 +187,13 @@
            (related_address_ == c.related_address_);
   }
 
+  // Determines whether this candidate can be considered equivalent to the
+  // given one when looking for a matching candidate to remove.
+  bool MatchesForRemoval(const Candidate& c) const {
+    return component_ == c.component_ && protocol_ == c.protocol_ &&
+           address_ == c.address_;
+  }
+
   std::string ToString() const {
     return ToStringInternal(false);
   }
@@ -222,10 +235,10 @@
     std::ostringstream ost;
     std::string address = sensitive ? address_.ToSensitiveString() :
                                       address_.ToString();
-    ost << "Cand[" << foundation_ << ":" << component_ << ":" << protocol_
-        << ":" << priority_ << ":" << address << ":" << type_ << ":"
-        << related_address_ << ":" << username_ << ":" << password_ << ":"
-        << network_cost_ << "]";
+    ost << "Cand[" << transport_name_ << ":" << foundation_ << ":" << component_
+        << ":" << protocol_ << ":" << priority_ << ":" << address << ":"
+        << type_ << ":" << related_address_ << ":" << username_ << ":"
+        << password_ << ":" << network_cost_ << "]";
     return ost.str();
   }
 
@@ -245,6 +258,7 @@
   rtc::SocketAddress related_address_;
   std::string tcptype_;
   uint32_t network_cost_ = 0;
+  std::string transport_name_;
 };
 
 // Used during parsing and writing to map component to channel name
diff --git a/webrtc/p2p/base/dtlstransportchannel.cc b/webrtc/p2p/base/dtlstransportchannel.cc
index 2185fb3..bbf3e5c 100644
--- a/webrtc/p2p/base/dtlstransportchannel.cc
+++ b/webrtc/p2p/base/dtlstransportchannel.cc
@@ -113,6 +113,8 @@
       this, &DtlsTransportChannelWrapper::OnGatheringState);
   channel_->SignalCandidateGathered.connect(
       this, &DtlsTransportChannelWrapper::OnCandidateGathered);
+  channel_->SignalCandidatesRemoved.connect(
+      this, &DtlsTransportChannelWrapper::OnCandidatesRemoved);
   channel_->SignalRoleConflict.connect(this,
       &DtlsTransportChannelWrapper::OnRoleConflict);
   channel_->SignalRouteChange.connect(this,
@@ -613,6 +615,13 @@
   SignalCandidateGathered(this, c);
 }
 
+void DtlsTransportChannelWrapper::OnCandidatesRemoved(
+    TransportChannelImpl* channel,
+    const Candidates& candidates) {
+  ASSERT(channel == channel_);
+  SignalCandidatesRemoved(this, candidates);
+}
+
 void DtlsTransportChannelWrapper::OnRoleConflict(
     TransportChannelImpl* channel) {
   ASSERT(channel == channel_);
diff --git a/webrtc/p2p/base/dtlstransportchannel.h b/webrtc/p2p/base/dtlstransportchannel.h
index ad30441..a58b1a0 100644
--- a/webrtc/p2p/base/dtlstransportchannel.h
+++ b/webrtc/p2p/base/dtlstransportchannel.h
@@ -186,6 +186,9 @@
   void AddRemoteCandidate(const Candidate& candidate) override {
     channel_->AddRemoteCandidate(candidate);
   }
+  void RemoveRemoteCandidate(const Candidate& candidate) override {
+    channel_->RemoveRemoteCandidate(candidate);
+  }
 
   void SetIceConfig(const IceConfig& config) override {
     channel_->SetIceConfig(config);
@@ -209,6 +212,8 @@
   bool HandleDtlsPacket(const char* data, size_t size);
   void OnGatheringState(TransportChannelImpl* channel);
   void OnCandidateGathered(TransportChannelImpl* channel, const Candidate& c);
+  void OnCandidatesRemoved(TransportChannelImpl* channel,
+                           const Candidates& candidates);
   void OnRoleConflict(TransportChannelImpl* channel);
   void OnRouteChange(TransportChannel* channel, const Candidate& candidate);
   void OnConnectionRemoved(TransportChannelImpl* channel);
diff --git a/webrtc/p2p/base/faketransportcontroller.h b/webrtc/p2p/base/faketransportcontroller.h
index c5e2afea..ae5e866 100644
--- a/webrtc/p2p/base/faketransportcontroller.h
+++ b/webrtc/p2p/base/faketransportcontroller.h
@@ -216,6 +216,9 @@
   void AddRemoteCandidate(const Candidate& candidate) override {
     remote_candidates_.push_back(candidate);
   }
+
+  void RemoveRemoteCandidate(const Candidate& candidate) override {}
+
   const Candidates& remote_candidates() const { return remote_candidates_; }
 
   void OnMessage(rtc::Message* msg) override {
diff --git a/webrtc/p2p/base/p2ptransportchannel.cc b/webrtc/p2p/base/p2ptransportchannel.cc
index b21d584..cdfcf95 100644
--- a/webrtc/p2p/base/p2ptransportchannel.cc
+++ b/webrtc/p2p/base/p2ptransportchannel.cc
@@ -761,6 +761,19 @@
   SortConnections();
 }
 
+void P2PTransportChannel::RemoveRemoteCandidate(
+    const Candidate& cand_to_remove) {
+  auto iter =
+      std::remove_if(remote_candidates_.begin(), remote_candidates_.end(),
+                     [cand_to_remove](const Candidate& candidate) {
+                       return cand_to_remove.MatchesForRemoval(candidate);
+                     });
+  if (iter != remote_candidates_.end()) {
+    LOG(LS_VERBOSE) << "Removed remote candidate " << cand_to_remove.ToString();
+    remote_candidates_.erase(iter, remote_candidates_.end());
+  }
+}
+
 // Creates connections from all of the ports that we care about to the given
 // remote candidate.  The return value is true if we created a connection from
 // the origin port.
@@ -1449,7 +1462,11 @@
   ports_.erase(it);
   LOG(INFO) << "Removed port due to inactive networks: " << ports_.size()
             << " remaining";
-  // TODO(honghaiz): Signal candidate removals to the remote side.
+  std::vector<Candidate> candidates = port->Candidates();
+  for (Candidate& candidate : candidates) {
+    candidate.set_transport_name(transport_name());
+  }
+  SignalCandidatesRemoved(this, candidates);
 }
 
 // We data is available, let listeners know
diff --git a/webrtc/p2p/base/p2ptransportchannel.h b/webrtc/p2p/base/p2ptransportchannel.h
index 3ca25d4..b86389a0 100644
--- a/webrtc/p2p/base/p2ptransportchannel.h
+++ b/webrtc/p2p/base/p2ptransportchannel.h
@@ -92,6 +92,7 @@
     return gathering_state_;
   }
   void AddRemoteCandidate(const Candidate& candidate) override;
+  void RemoveRemoteCandidate(const Candidate& candidate) override;
   // Sets the parameters in IceConfig. We do not set them blindly. Instead, we
   // only update the parameter if it is considered set in |config|. For example,
   // a negative value of receiving_timeout will be considered "not set" and we
diff --git a/webrtc/p2p/base/p2ptransportchannel_unittest.cc b/webrtc/p2p/base/p2ptransportchannel_unittest.cc
index c54f054..e083c33f 100644
--- a/webrtc/p2p/base/p2ptransportchannel_unittest.cc
+++ b/webrtc/p2p/base/p2ptransportchannel_unittest.cc
@@ -98,9 +98,7 @@
 static const uint64_t kTiebreaker1 = 11111;
 static const uint64_t kTiebreaker2 = 22222;
 
-enum {
-  MSG_CANDIDATE
-};
+enum { MSG_ADD_CANDIDATES, MSG_REMOVE_CANDIDATES };
 
 static cricket::IceConfig CreateIceConfig(int receiving_timeout,
                                           bool gather_continually,
@@ -216,12 +214,14 @@
     rtc::scoped_ptr<cricket::P2PTransportChannel> ch_;
   };
 
-  struct CandidateData : public rtc::MessageData {
-    CandidateData(cricket::TransportChannel* ch, const cricket::Candidate& c)
-        : channel(ch), candidate(c) {
-    }
+  struct CandidatesData : public rtc::MessageData {
+    CandidatesData(cricket::TransportChannel* ch, const cricket::Candidate& c)
+        : channel(ch), candidates(1, c) {}
+    CandidatesData(cricket::TransportChannel* ch,
+                   const std::vector<cricket::Candidate>& cc)
+        : channel(ch), candidates(cc) {}
     cricket::TransportChannel* channel;
-    cricket::Candidate candidate;
+    cricket::Candidates candidates;
   };
 
   struct Endpoint {
@@ -262,7 +262,7 @@
     uint64_t tiebreaker_;
     bool role_conflict_;
     bool save_candidates_;
-    std::vector<CandidateData*> saved_candidates_;
+    std::vector<CandidatesData*> saved_candidates_;
   };
 
   ChannelData* GetChannelData(cricket::TransportChannel* channel) {
@@ -310,7 +310,9 @@
     cricket::P2PTransportChannel* channel = new cricket::P2PTransportChannel(
         "test content name", component, GetAllocator(endpoint));
     channel->SignalCandidateGathered.connect(
-        this, &P2PTransportChannelTestBase::OnCandidate);
+        this, &P2PTransportChannelTestBase::OnCandidateGathered);
+    channel->SignalCandidatesRemoved.connect(
+        this, &P2PTransportChannelTestBase::OnCandidatesRemoved);
     channel->SignalReadPacket.connect(
         this, &P2PTransportChannelTestBase::OnReadPacket);
     channel->SignalRoleConflict.connect(
@@ -645,15 +647,15 @@
   }
 
   // We pass the candidates directly to the other side.
-  void OnCandidate(cricket::TransportChannelImpl* ch,
-                   const cricket::Candidate& c) {
+  void OnCandidateGathered(cricket::TransportChannelImpl* ch,
+                           const cricket::Candidate& c) {
     if (force_relay_ && c.type() != cricket::RELAY_PORT_TYPE)
       return;
 
     if (GetEndpoint(ch)->save_candidates_) {
-      GetEndpoint(ch)->saved_candidates_.push_back(new CandidateData(ch, c));
+      GetEndpoint(ch)->saved_candidates_.push_back(new CandidatesData(ch, c));
     } else {
-      main_->Post(this, MSG_CANDIDATE, new CandidateData(ch, c));
+      main_->Post(this, MSG_ADD_CANDIDATES, new CandidatesData(ch, c));
     }
   }
 
@@ -661,26 +663,35 @@
     GetEndpoint(endpoint)->save_candidates_ = true;
   }
 
+  void OnCandidatesRemoved(cricket::TransportChannelImpl* ch,
+                           const std::vector<cricket::Candidate>& candidates) {
+    // Candidate removals are not paused.
+    CandidatesData* candidates_data = new CandidatesData(ch, candidates);
+    main_->Post(this, MSG_REMOVE_CANDIDATES, candidates_data);
+  }
+
   // Tcp candidate verification has to be done when they are generated.
   void VerifySavedTcpCandidates(int endpoint, const std::string& tcptype) {
     for (auto& data : GetEndpoint(endpoint)->saved_candidates_) {
-      EXPECT_EQ(data->candidate.protocol(), cricket::TCP_PROTOCOL_NAME);
-      EXPECT_EQ(data->candidate.tcptype(), tcptype);
-      if (data->candidate.tcptype() == cricket::TCPTYPE_ACTIVE_STR) {
-        EXPECT_EQ(data->candidate.address().port(), cricket::DISCARD_PORT);
-      } else if (data->candidate.tcptype() == cricket::TCPTYPE_PASSIVE_STR) {
-        EXPECT_NE(data->candidate.address().port(), cricket::DISCARD_PORT);
-      } else {
-        FAIL() << "Unknown tcptype: " << data->candidate.tcptype();
+      for (auto& candidate : data->candidates) {
+        EXPECT_EQ(candidate.protocol(), cricket::TCP_PROTOCOL_NAME);
+        EXPECT_EQ(candidate.tcptype(), tcptype);
+        if (candidate.tcptype() == cricket::TCPTYPE_ACTIVE_STR) {
+          EXPECT_EQ(candidate.address().port(), cricket::DISCARD_PORT);
+        } else if (candidate.tcptype() == cricket::TCPTYPE_PASSIVE_STR) {
+          EXPECT_NE(candidate.address().port(), cricket::DISCARD_PORT);
+        } else {
+          FAIL() << "Unknown tcptype: " << candidate.tcptype();
+        }
       }
     }
   }
 
   void ResumeCandidates(int endpoint) {
     Endpoint* ed = GetEndpoint(endpoint);
-    std::vector<CandidateData*>::iterator it = ed->saved_candidates_.begin();
+    std::vector<CandidatesData*>::iterator it = ed->saved_candidates_.begin();
     for (; it != ed->saved_candidates_.end(); ++it) {
-      main_->Post(this, MSG_CANDIDATE, *it);
+      main_->Post(this, MSG_ADD_CANDIDATES, *it);
     }
     ed->saved_candidates_.clear();
     ed->save_candidates_ = false;
@@ -688,18 +699,29 @@
 
   void OnMessage(rtc::Message* msg) {
     switch (msg->message_id) {
-      case MSG_CANDIDATE: {
-        rtc::scoped_ptr<CandidateData> data(
-            static_cast<CandidateData*>(msg->pdata));
+      case MSG_ADD_CANDIDATES: {
+        rtc::scoped_ptr<CandidatesData> data(
+            static_cast<CandidatesData*>(msg->pdata));
         cricket::P2PTransportChannel* rch = GetRemoteChannel(data->channel);
-        cricket::Candidate c = data->candidate;
-        if (clear_remote_candidates_ufrag_pwd_) {
-          c.set_username("");
-          c.set_password("");
+        for (auto& c : data->candidates) {
+          if (clear_remote_candidates_ufrag_pwd_) {
+            c.set_username("");
+            c.set_password("");
+          }
+          LOG(LS_INFO) << "Candidate(" << data->channel->component() << "->"
+                       << rch->component() << "): " << c.ToString();
+          rch->AddRemoteCandidate(c);
         }
-        LOG(LS_INFO) << "Candidate(" << data->channel->component() << "->"
-                     << rch->component() << "): " << c.ToString();
-        rch->AddRemoteCandidate(c);
+        break;
+      }
+      case MSG_REMOVE_CANDIDATES: {
+        rtc::scoped_ptr<CandidatesData> data(
+            static_cast<CandidatesData*>(msg->pdata));
+        cricket::P2PTransportChannel* rch = GetRemoteChannel(data->channel);
+        for (cricket::Candidate& c : data->candidates) {
+          LOG(LS_INFO) << "Removed remote candidate " << c.ToString();
+          rch->RemoveRemoteCandidate(c);
+        }
         break;
       }
     }
@@ -1772,9 +1794,10 @@
                  ep2_ch1()->GetState(), 1000);
 }
 
-// Tests that when a network interface becomes inactive, the ports associated
-// with that network will be removed from the port list of the channel if
-// and only if Continual Gathering is enabled.
+// Tests that when a network interface becomes inactive, if and only if
+// Continual Gathering is enabled, the ports associated with that network
+// will be removed from the port list of the channel, and the respective
+// remote candidates on the other participant will be removed eventually.
 TEST_F(P2PTransportChannelMultihomedTest, TestNetworkBecomesInactive) {
   AddAddress(0, kPublicAddrs[0]);
   AddAddress(1, kPublicAddrs[1]);
@@ -1793,14 +1816,20 @@
   // Endpoint 1 enabled continual gathering; the port will be removed
   // when the interface is removed.
   RemoveAddress(0, kPublicAddrs[0]);
-  EXPECT_EQ(0U, ep1_ch1()->ports().size());
+  EXPECT_TRUE(ep1_ch1()->ports().empty());
+  // The remote candidates will be removed eventually.
+  EXPECT_TRUE_WAIT(ep2_ch1()->remote_candidates().empty(), 1000);
 
   size_t num_ports = ep2_ch1()->ports().size();
   EXPECT_LE(1U, num_ports);
+  size_t num_remote_candidates = ep1_ch1()->remote_candidates().size();
   // Endpoint 2 did not enable continual gathering; the port will not be removed
-  // when the interface is removed.
+  // when the interface is removed and neither the remote candidates on the
+  // other participant.
   RemoveAddress(1, kPublicAddrs[1]);
+  rtc::Thread::Current()->ProcessMessages(500);
   EXPECT_EQ(num_ports, ep2_ch1()->ports().size());
+  EXPECT_EQ(num_remote_candidates, ep1_ch1()->remote_candidates().size());
 }
 
 /*
diff --git a/webrtc/p2p/base/transport.cc b/webrtc/p2p/base/transport.cc
index 17d05ad..b8d9810 100644
--- a/webrtc/p2p/base/transport.cc
+++ b/webrtc/p2p/base/transport.cc
@@ -294,6 +294,22 @@
     }
   }
 
+  if (!HasChannel(cand.component())) {
+    *error = "Candidate has an unknown component: " + cand.ToString() +
+             " for content: " + name();
+    return false;
+  }
+
+  return true;
+}
+
+bool Transport::VerifyCandidates(const Candidates& candidates,
+                                 std::string* error) {
+  for (const Candidate& candidate : candidates) {
+    if (!VerifyCandidate(candidate, error)) {
+      return false;
+    }
+  }
   return true;
 }
 
@@ -318,16 +334,9 @@
 bool Transport::AddRemoteCandidates(const std::vector<Candidate>& candidates,
                                     std::string* error) {
   ASSERT(!channels_destroyed_);
-  // Verify each candidate before passing down to transport layer.
-  for (const Candidate& cand : candidates) {
-    if (!VerifyCandidate(cand, error)) {
-      return false;
-    }
-    if (!HasChannel(cand.component())) {
-      *error = "Candidate has unknown component: " + cand.ToString() +
-               " for content: " + name();
-      return false;
-    }
+  // Verify each candidate before passing down to the transport layer.
+  if (!VerifyCandidates(candidates, error)) {
+    return false;
   }
 
   for (const Candidate& candidate : candidates) {
@@ -339,6 +348,23 @@
   return true;
 }
 
+bool Transport::RemoveRemoteCandidates(const std::vector<Candidate>& candidates,
+                                       std::string* error) {
+  ASSERT(!channels_destroyed_);
+  // Verify each candidate before passing down to the transport layer.
+  if (!VerifyCandidates(candidates, error)) {
+    return false;
+  }
+
+  for (const Candidate& candidate : candidates) {
+    TransportChannelImpl* channel = GetChannel(candidate.component());
+    if (channel != nullptr) {
+      channel->RemoveRemoteCandidate(candidate);
+    }
+  }
+  return true;
+}
+
 bool Transport::ApplyLocalTransportDescription(TransportChannelImpl* ch,
                                                std::string* error_desc) {
   ch->SetIceCredentials(local_description_->ice_ufrag,
diff --git a/webrtc/p2p/base/transport.h b/webrtc/p2p/base/transport.h
index 84581c8..66e300a 100644
--- a/webrtc/p2p/base/transport.h
+++ b/webrtc/p2p/base/transport.h
@@ -258,11 +258,8 @@
   // Called when one or more candidates are ready from the remote peer.
   bool AddRemoteCandidates(const std::vector<Candidate>& candidates,
                            std::string* error);
-
-  // If candidate is not acceptable, returns false and sets error.
-  // Call this before calling OnRemoteCandidates.
-  virtual bool VerifyCandidate(const Candidate& candidate,
-                               std::string* error);
+  bool RemoveRemoteCandidates(const std::vector<Candidate>& candidates,
+                              std::string* error);
 
   virtual bool GetSslRole(rtc::SSLRole* ssl_role) const { return false; }
 
@@ -316,6 +313,11 @@
       std::string* error_desc);
 
  private:
+  // If a candidate is not acceptable, returns false and sets error.
+  // Call this before calling OnRemoteCandidates.
+  bool VerifyCandidate(const Candidate& candidate, std::string* error);
+  bool VerifyCandidates(const Candidates& candidates, std::string* error);
+
   // Candidate component => TransportChannelImpl*
   typedef std::map<int, TransportChannelImpl*> ChannelMap;
 
diff --git a/webrtc/p2p/base/transportchannelimpl.h b/webrtc/p2p/base/transportchannelimpl.h
index 1fa088a..904ebf5 100644
--- a/webrtc/p2p/base/transportchannelimpl.h
+++ b/webrtc/p2p/base/transportchannelimpl.h
@@ -76,7 +76,10 @@
   // before forwarding.
   sigslot::signal2<TransportChannelImpl*, const Candidate&>
       SignalCandidateGathered;
+  sigslot::signal2<TransportChannelImpl*, const Candidates&>
+      SignalCandidatesRemoved;
   virtual void AddRemoteCandidate(const Candidate& candidate) = 0;
+  virtual void RemoveRemoteCandidate(const Candidate& candidate) = 0;
 
   virtual IceGatheringState gathering_state() const = 0;
 
diff --git a/webrtc/p2p/base/transportcontroller.cc b/webrtc/p2p/base/transportcontroller.cc
index 053388e..128d2fc 100644
--- a/webrtc/p2p/base/transportcontroller.cc
+++ b/webrtc/p2p/base/transportcontroller.cc
@@ -127,6 +127,12 @@
                 transport_name, candidates, err));
 }
 
+bool TransportController::RemoveRemoteCandidates(const Candidates& candidates,
+                                                 std::string* err) {
+  return worker_thread_->Invoke<bool>(rtc::Bind(
+      &TransportController::RemoveRemoteCandidates_w, this, candidates, err));
+}
+
 bool TransportController::ReadyForRemoteCandidates(
     const std::string& transport_name) {
   return worker_thread_->Invoke<bool>(rtc::Bind(
@@ -162,6 +168,8 @@
       this, &TransportController::OnChannelGatheringState_w);
   channel->SignalCandidateGathered.connect(
       this, &TransportController::OnChannelCandidateGathered_w);
+  channel->SignalCandidatesRemoved.connect(
+      this, &TransportController::OnChannelCandidatesRemoved_w);
   channel->SignalRoleConflict.connect(
       this, &TransportController::OnChannelRoleConflict_w);
   channel->SignalConnectionRemoved.connect(
@@ -460,6 +468,28 @@
   return transport->AddRemoteCandidates(candidates, err);
 }
 
+bool TransportController::RemoveRemoteCandidates_w(const Candidates& candidates,
+                                                   std::string* err) {
+  RTC_DCHECK(worker_thread()->IsCurrent());
+  std::map<std::string, Candidates> candidates_by_transport_name;
+  for (const Candidate& cand : candidates) {
+    RTC_DCHECK(!cand.transport_name().empty());
+    candidates_by_transport_name[cand.transport_name()].push_back(cand);
+  }
+
+  bool result = true;
+  for (auto kv : candidates_by_transport_name) {
+    Transport* transport = GetTransport_w(kv.first);
+    if (!transport) {
+      // If we didn't find a transport, that's not an error;
+      // it could have been deleted as a result of bundling.
+      continue;
+    }
+    result &= transport->RemoveRemoteCandidates(kv.second, err);
+  }
+  return result;
+}
+
 bool TransportController::ReadyForRemoteCandidates_w(
     const std::string& transport_name) {
   RTC_DCHECK(worker_thread()->IsCurrent());
@@ -518,6 +548,21 @@
   signaling_thread_->Post(this, MSG_CANDIDATESGATHERED, data);
 }
 
+void TransportController::OnChannelCandidatesRemoved_w(
+    TransportChannelImpl* channel,
+    const Candidates& candidates) {
+  invoker_.AsyncInvoke<void>(
+      signaling_thread_,
+      rtc::Bind(&TransportController::OnChannelCandidatesRemoved, this,
+                candidates));
+}
+
+void TransportController::OnChannelCandidatesRemoved(
+    const Candidates& candidates) {
+  RTC_DCHECK(signaling_thread_->IsCurrent());
+  SignalCandidatesRemoved(candidates);
+}
+
 void TransportController::OnChannelRoleConflict_w(
     TransportChannelImpl* channel) {
   RTC_DCHECK(worker_thread_->IsCurrent());
diff --git a/webrtc/p2p/base/transportcontroller.h b/webrtc/p2p/base/transportcontroller.h
index 450e6b3..ed72160 100644
--- a/webrtc/p2p/base/transportcontroller.h
+++ b/webrtc/p2p/base/transportcontroller.h
@@ -15,6 +15,7 @@
 #include <string>
 #include <vector>
 
+#include "webrtc/base/asyncinvoker.h"
 #include "webrtc/base/sigslot.h"
 #include "webrtc/base/sslstreamadapter.h"
 #include "webrtc/p2p/base/candidate.h"
@@ -74,6 +75,7 @@
   bool AddRemoteCandidates(const std::string& transport_name,
                            const Candidates& candidates,
                            std::string* err);
+  bool RemoveRemoteCandidates(const Candidates& candidates, std::string* err);
   bool ReadyForRemoteCandidates(const std::string& transport_name);
   bool GetStats(const std::string& transport_name, TransportStats* stats);
 
@@ -108,6 +110,8 @@
   sigslot::signal2<const std::string&, const Candidates&>
       SignalCandidatesGathered;
 
+  sigslot::signal1<const Candidates&> SignalCandidatesRemoved;
+
   // for unit test
   const rtc::scoped_refptr<rtc::RTCCertificate>& certificate_for_testing();
 
@@ -176,6 +180,7 @@
   bool AddRemoteCandidates_w(const std::string& transport_name,
                              const Candidates& candidates,
                              std::string* err);
+  bool RemoveRemoteCandidates_w(const Candidates& candidates, std::string* err);
   bool ReadyForRemoteCandidates_w(const std::string& transport_name);
   bool GetStats_w(const std::string& transport_name, TransportStats* stats);
 
@@ -185,6 +190,9 @@
   void OnChannelGatheringState_w(TransportChannelImpl* channel);
   void OnChannelCandidateGathered_w(TransportChannelImpl* channel,
                                     const Candidate& candidate);
+  void OnChannelCandidatesRemoved(const Candidates& candidates);
+  void OnChannelCandidatesRemoved_w(TransportChannelImpl* channel,
+                                    const Candidates& candidates);
   void OnChannelRoleConflict_w(TransportChannelImpl* channel);
   void OnChannelConnectionRemoved_w(TransportChannelImpl* channel);
 
@@ -212,6 +220,7 @@
   bool ice_role_switch_ = false;
   uint64_t ice_tiebreaker_ = rtc::CreateRandomId64();
   rtc::scoped_refptr<rtc::RTCCertificate> certificate_;
+  rtc::AsyncInvoker invoker_;
 };
 
 }  // namespace cricket