Revert of Remove candidates when doing continual gathering

webrtc/api/peerconnectioninterface.h

Index: webrtc/api/peerconnectioninterface.h
diff --git a/webrtc/api/peerconnectioninterface.h b/webrtc/api/peerconnectioninterface.h
index 22109c4088e9415f0f55015ee95b9747dea24b4d..f6c8cbaf00bd0d93b2b7c60cd13506928b9a9de5 100644
--- a/webrtc/api/peerconnectioninterface.h
+++ b/webrtc/api/peerconnectioninterface.h
@@ -439,12 +439,6 @@
   // 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.
@@ -500,12 +494,6 @@
 
   // 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) {}