1. Override and virtual has to be consistent.
2. provide an implementation for SetIceConnectionReceivingTimeout so that Chrome does not complain.

BUG=

Review URL: https://codereview.webrtc.org/1227843006

Cr-Commit-Position: refs/heads/master@{#9574}
diff --git a/talk/app/webrtc/peerconnectioninterface.h b/talk/app/webrtc/peerconnectioninterface.h
index 367bafe..ce32b50 100644
--- a/talk/app/webrtc/peerconnectioninterface.h
+++ b/talk/app/webrtc/peerconnectioninterface.h
@@ -336,7 +336,7 @@
   virtual void SetRemoteDescription(SetSessionDescriptionObserver* observer,
                                     SessionDescriptionInterface* desc) = 0;
   // Sets the ICE connection receiving timeout value in milliseconds.
-  virtual void SetIceConnectionReceivingTimeout(int timeout_ms) = 0;
+  virtual void SetIceConnectionReceivingTimeout(int timeout_ms) {}
   // Restarts or updates the ICE Agent process of gathering local candidates
   // and pinging remote candidates.
   virtual bool UpdateIce(const IceServers& configuration,
diff --git a/webrtc/p2p/base/p2ptransportchannel.h b/webrtc/p2p/base/p2ptransportchannel.h
index b8ad5e2..926de95 100644
--- a/webrtc/p2p/base/p2ptransportchannel.h
+++ b/webrtc/p2p/base/p2ptransportchannel.h
@@ -73,6 +73,9 @@
   virtual void Connect();
   virtual void OnSignalingReady();
   virtual void OnCandidate(const Candidate& candidate);
+  // Sets the receiving timeout in milliseconds.
+  // This also sets the check_receiving_delay proportionally.
+  virtual void SetReceivingTimeout(int receiving_timeout_ms);
 
   // From TransportChannel:
   virtual int SendPacket(const char *data, size_t len,
@@ -85,10 +88,6 @@
   const Connection* best_connection() const { return best_connection_; }
   void set_incoming_only(bool value) { incoming_only_ = value; }
 
-  // Sets the receiving timeout in milliseconds.
-  // This also sets the check_receiving_delay proportionally.
-  void SetReceivingTimeout(int receiving_timeout_ms) override;
-
   // Note: This is only for testing purpose.
   // |ports_| should not be changed from outside.
   const std::vector<PortInterface*>& ports() { return ports_; }