diff --git a/webrtc/p2p/base/fakeportallocator.h b/webrtc/p2p/base/fakeportallocator.h
index 15e7937..0013085 100644
--- a/webrtc/p2p/base/fakeportallocator.h
+++ b/webrtc/p2p/base/fakeportallocator.h
@@ -123,7 +123,6 @@
   }
 
   void StartGettingPorts() override {
-    PortAllocatorSession::StartGettingPorts();
     if (!port_) {
       rtc::Network& network =
           (rtc::HasIPv6Enabled() && (flags() & PORTALLOCATOR_ENABLE_IPV6))
@@ -137,8 +136,13 @@
       AddPort(port_.get());
     }
     ++port_config_count_;
+    running_ = true;
   }
 
+  void StopGettingPorts() override { running_ = false; }
+  bool IsGettingPorts() override { return running_; }
+  void ClearGettingPorts() override {}
+
   std::vector<PortInterface*> ReadyPorts() const override {
     return ready_ports_;
   }
@@ -204,6 +208,7 @@
   std::vector<RelayServerConfig> turn_servers_;
   uint32_t candidate_filter_ = CF_ALL;
   int transport_info_update_count_ = 0;
+  bool running_ = false;
 };
 
 class FakePortAllocator : public cricket::PortAllocator {
diff --git a/webrtc/p2p/base/portallocator.h b/webrtc/p2p/base/portallocator.h
index dc1961d..152474d 100644
--- a/webrtc/p2p/base/portallocator.h
+++ b/webrtc/p2p/base/portallocator.h
@@ -88,14 +88,6 @@
   CF_ALL = 0x7,
 };
 
-enum class SessionState {
-  GATHERING,  // Actively allocating ports and gathering candidates.
-  CLEARED,    // Current allocation process has been stopped but may start
-              // new ones.
-  STOPPED     // This session has completely stopped, no new allocation
-              // process will be started.
-};
-
 // TODO(deadbeef): Rename to TurnCredentials (and username to ufrag).
 struct RelayCredentials {
   RelayCredentials() {}
@@ -167,18 +159,19 @@
   virtual void SetCandidateFilter(uint32_t filter) = 0;
 
   // Starts gathering STUN and Relay configurations.
-  virtual void StartGettingPorts() { state_ = SessionState::GATHERING; }
+  virtual void StartGettingPorts() = 0;
   // Completely stops the gathering process and will not start new ones.
-  virtual void StopGettingPorts() { state_ = SessionState::STOPPED; }
-  // Only stops the existing gathering process but may start new ones if needed.
-  virtual void ClearGettingPorts() { state_ = SessionState::CLEARED; }
+  virtual void StopGettingPorts() = 0;
   // Whether the session is actively getting ports.
-  bool IsGettingPorts() { return state_ == SessionState::GATHERING; }
+  virtual bool IsGettingPorts() = 0;
+  // ClearGettingPorts and IsCleared are used by continual gathering.
+  // Only stops the existing gathering process but may start new ones if needed.
+  virtual void ClearGettingPorts() = 0;
   // Whether it is in the state where the existing gathering process is stopped,
   // but new ones may be started (basically after calling ClearGettingPorts).
-  bool IsCleared() { return state_ == SessionState::CLEARED; }
+  virtual bool IsCleared() const { return false; }
   // Whether the session has completely stopped.
-  bool IsStopped() { return state_ == SessionState::STOPPED; }
+  virtual bool IsStopped() const { return false; }
   // Re-gathers candidates on networks that do not have any connections. More
   // precisely, a network interface may have more than one IP addresses (e.g.,
   // IPv4 and IPv6 addresses). Each address subnet will be used to create a
@@ -252,7 +245,6 @@
   int component_;
   std::string ice_ufrag_;
   std::string ice_pwd_;
-  SessionState state_ = SessionState::CLEARED;
 
   // SetIceParameters is an implementation detail which only PortAllocator
   // should be able to call.
diff --git a/webrtc/p2p/client/basicportallocator.cc b/webrtc/p2p/client/basicportallocator.cc
index 7f8ad52..fabbc42 100644
--- a/webrtc/p2p/client/basicportallocator.cc
+++ b/webrtc/p2p/client/basicportallocator.cc
@@ -238,7 +238,7 @@
 
 void BasicPortAllocatorSession::StartGettingPorts() {
   network_thread_ = rtc::Thread::Current();
-  PortAllocatorSession::StartGettingPorts();
+  state_ = SessionState::GATHERING;
   if (!socket_factory_) {
     owned_socket_factory_.reset(
         new rtc::BasicPacketSocketFactory(network_thread_));
@@ -257,7 +257,7 @@
   ClearGettingPorts();
   // Note: this must be called after ClearGettingPorts because both may set the
   // session state and we should set the state to STOPPED.
-  PortAllocatorSession::StopGettingPorts();
+  state_ = SessionState::STOPPED;
 }
 
 void BasicPortAllocatorSession::ClearGettingPorts() {
@@ -266,7 +266,7 @@
   for (uint32_t i = 0; i < sequences_.size(); ++i) {
     sequences_[i]->Stop();
   }
-  PortAllocatorSession::ClearGettingPorts();
+  state_ = SessionState::CLEARED;
 }
 
 std::vector<rtc::Network*> BasicPortAllocatorSession::GetFailedNetworks() {
diff --git a/webrtc/p2p/client/basicportallocator.h b/webrtc/p2p/client/basicportallocator.h
index f133bdf..d9cfc4d 100644
--- a/webrtc/p2p/client/basicportallocator.h
+++ b/webrtc/p2p/client/basicportallocator.h
@@ -74,6 +74,14 @@
 struct PortConfiguration;
 class AllocationSequence;
 
+enum class SessionState {
+  GATHERING,  // Actively allocating ports and gathering candidates.
+  CLEARED,    // Current allocation process has been stopped but may start
+              // new ones.
+  STOPPED     // This session has completely stopped, no new allocation
+              // process will be started.
+};
+
 class BasicPortAllocatorSession : public PortAllocatorSession,
                                   public rtc::MessageHandler {
  public:
@@ -92,6 +100,9 @@
   void StartGettingPorts() override;
   void StopGettingPorts() override;
   void ClearGettingPorts() override;
+  bool IsGettingPorts() override { return state_ == SessionState::GATHERING; }
+  bool IsCleared() const override { return state_ == SessionState::CLEARED; }
+  bool IsStopped() const override { return state_ == SessionState::STOPPED; }
   // These will all be cricket::Ports.
   std::vector<PortInterface*> ReadyPorts() const override;
   std::vector<Candidate> ReadyCandidates() const override;
@@ -212,6 +223,7 @@
   uint32_t candidate_filter_ = CF_ALL;
   // Whether to prune low-priority ports, taken from the port allocator.
   bool prune_turn_ports_;
+  SessionState state_ = SessionState::CLEARED;
 
   friend class AllocationSequence;
 };