Add override declarations to PeerConnectionObserver subclasses, and delete obsolete methods.

webrtc/pc/test/peerconnectiontestwrapper.h

Index: webrtc/pc/test/peerconnectiontestwrapper.h
diff --git a/webrtc/pc/test/peerconnectiontestwrapper.h b/webrtc/pc/test/peerconnectiontestwrapper.h
index 59e6968f14fe7977fd0f9301e793c67904308093..b761b05fcd0b9361409b8176d17debfb8793b95e 100644
--- a/webrtc/pc/test/peerconnectiontestwrapper.h
+++ b/webrtc/pc/test/peerconnectiontestwrapper.h
@@ -50,27 +50,24 @@ class PeerConnectionTestWrapper
       const webrtc::DataChannelInit& init);
 
   // Implements PeerConnectionObserver.
-  virtual void OnSignalingChange(
-     webrtc::PeerConnectionInterface::SignalingState new_state) {}
-  virtual void OnStateChange(
-      webrtc::PeerConnectionObserver::StateType state_changed) {}
-  virtual void OnAddStream(
-      rtc::scoped_refptr<webrtc::MediaStreamInterface> stream);
-  virtual void OnRemoveStream(
-      rtc::scoped_refptr<webrtc::MediaStreamInterface> stream) {}
-  virtual void OnDataChannel(
-      rtc::scoped_refptr<webrtc::DataChannelInterface> data_channel);
-  virtual void OnRenegotiationNeeded() {}
-  virtual void OnIceConnectionChange(
-      webrtc::PeerConnectionInterface::IceConnectionState new_state) {}
-  virtual void OnIceGatheringChange(
-      webrtc::PeerConnectionInterface::IceGatheringState new_state) {}
-  virtual void OnIceCandidate(const webrtc::IceCandidateInterface* candidate);
-  virtual void OnIceComplete() {}
+  void OnSignalingChange(
+     webrtc::PeerConnectionInterface::SignalingState new_state) override {}
+  void OnAddStream(
+      rtc::scoped_refptr<webrtc::MediaStreamInterface> stream) override;
+  void OnRemoveStream(
+      rtc::scoped_refptr<webrtc::MediaStreamInterface> stream) override {}
+  void OnDataChannel(
+      rtc::scoped_refptr<webrtc::DataChannelInterface> data_channel) override ;
+  void OnRenegotiationNeeded() override {}
+  void OnIceConnectionChange(
+      webrtc::PeerConnectionInterface::IceConnectionState new_state) override {}
+  void OnIceGatheringChange(
+      webrtc::PeerConnectionInterface::IceGatheringState new_state) override {}
+  void OnIceCandidate(const webrtc::IceCandidateInterface* candidate) override;
 
   // Implements CreateSessionDescriptionObserver.
-  virtual void OnSuccess(webrtc::SessionDescriptionInterface* desc);
-  virtual void OnFailure(const std::string& error) {}
+  void OnSuccess(webrtc::SessionDescriptionInterface* desc) override;
+  void OnFailure(const std::string& error) override {}
 
   void CreateOffer(const webrtc::MediaConstraintsInterface* constraints);
   void CreateAnswer(const webrtc::MediaConstraintsInterface* constraints);