diff --git a/media/base/stream_params.cc b/media/base/stream_params.cc
index db781ac..0fe1be6 100644
--- a/media/base/stream_params.cc
+++ b/media/base/stream_params.cc
@@ -111,7 +111,7 @@
 StreamParams& StreamParams::operator=(StreamParams&&) = default;
 
 bool StreamParams::operator==(const StreamParams& other) const {
-  return (groupid == other.groupid && id == other.id && ssrcs == other.ssrcs &&
+  return (id == other.id && ssrcs == other.ssrcs &&
           ssrc_groups == other.ssrc_groups && cname == other.cname &&
           stream_ids_ == other.stream_ids_ &&
           // RIDs are not required to be in the same order for equality.
@@ -122,9 +122,6 @@
   char buf[2 * 1024];
   rtc::SimpleStringBuilder sb(buf);
   sb << "{";
-  if (!groupid.empty()) {
-    sb << "groupid:" << groupid << ";";
-  }
   if (!id.empty()) {
     sb << "id:" << id << ";";
   }
diff --git a/media/base/stream_params.h b/media/base/stream_params.h
index b8c3770..1f46469 100644
--- a/media/base/stream_params.h
+++ b/media/base/stream_params.h
@@ -183,11 +183,6 @@
 
   std::string ToString() const;
 
-  // Resource of the MUC jid of the participant of with this stream.
-  // For 1:1 calls, should be left empty (which means remote streams
-  // and local streams should not be mixed together). This is not used
-  // internally and should be deprecated.
-  std::string groupid;
   // A unique identifier of the StreamParams object. When the SDP is created,
   // this comes from the track ID of the sender that the StreamParams object
   // is associated with.
@@ -224,26 +219,22 @@
   std::vector<RidDescription> rids_;
 };
 
-// A Stream can be selected by either groupid+id or ssrc.
+// A Stream can be selected by either id or ssrc.
 struct StreamSelector {
   explicit StreamSelector(uint32_t ssrc) : ssrc(ssrc) {}
 
-  StreamSelector(const std::string& groupid, const std::string& streamid)
-      : ssrc(0), groupid(groupid), streamid(streamid) {}
-
   explicit StreamSelector(const std::string& streamid)
       : ssrc(0), streamid(streamid) {}
 
   bool Matches(const StreamParams& stream) const {
     if (ssrc == 0) {
-      return stream.groupid == groupid && stream.id == streamid;
+      return stream.id == streamid;
     } else {
       return stream.has_ssrc(ssrc);
     }
   }
 
   uint32_t ssrc;
-  std::string groupid;
   std::string streamid;
 };
 
@@ -274,19 +265,15 @@
 }
 
 inline const StreamParams* GetStreamByIds(const StreamParamsVec& streams,
-                                          const std::string& groupid,
                                           const std::string& id) {
-  return GetStream(streams, [&groupid, &id](const StreamParams& sp) {
-    return sp.groupid == groupid && sp.id == id;
-  });
+  return GetStream(streams,
+                   [&id](const StreamParams& sp) { return sp.id == id; });
 }
 
 inline StreamParams* GetStreamByIds(StreamParamsVec& streams,
-                                    const std::string& groupid,
                                     const std::string& id) {
-  return GetStream(streams, [&groupid, &id](const StreamParams& sp) {
-    return sp.groupid == groupid && sp.id == id;
-  });
+  return GetStream(streams,
+                   [&id](const StreamParams& sp) { return sp.id == id; });
 }
 
 inline const StreamParams* GetStream(const StreamParamsVec& streams,
@@ -318,11 +305,9 @@
       streams, [&ssrc](const StreamParams& sp) { return sp.has_ssrc(ssrc); });
 }
 inline bool RemoveStreamByIds(StreamParamsVec* streams,
-                              const std::string& groupid,
                               const std::string& id) {
-  return RemoveStream(streams, [&groupid, &id](const StreamParams& sp) {
-    return sp.groupid == groupid && sp.id == id;
-  });
+  return RemoveStream(streams,
+                      [&id](const StreamParams& sp) { return sp.id == id; });
 }
 
 }  // namespace cricket
diff --git a/pc/channel_unittest.cc b/pc/channel_unittest.cc
index b38ab94..ca5946b 100644
--- a/pc/channel_unittest.cc
+++ b/pc/channel_unittest.cc
@@ -626,13 +626,11 @@
   // SdpType::kOffer / SdpType::kAnswer.
   void TestChangeStreamParamsInContent() {
     cricket::StreamParams stream1;
-    stream1.groupid = "group1";
     stream1.id = "stream1";
     stream1.ssrcs.push_back(kSsrc1);
     stream1.cname = "stream1_cname";
 
     cricket::StreamParams stream2;
-    stream2.groupid = "group1";
     stream2.id = "stream2";
     stream2.ssrcs.push_back(kSsrc2);
     stream2.cname = "stream2_cname";
diff --git a/pc/media_session.cc b/pc/media_session.cc
index 6b8f254..21da2da 100644
--- a/pc/media_session.cc
+++ b/pc/media_session.cc
@@ -443,10 +443,7 @@
       ContainsFlexfecCodec(content_description->codecs());
 
   for (const SenderOptions& sender : sender_options) {
-    // groupid is empty for StreamParams generated using
-    // MediaSessionDescriptionFactory.
-    StreamParams* param =
-        GetStreamByIds(*current_streams, "" /*group_id*/, sender.track_id);
+    StreamParams* param = GetStreamByIds(*current_streams, sender.track_id);
     if (!param) {
       // This is a new sender.
       StreamParams stream_param =