Revert of Fix to make the start/stop functions for the Rtc Eventlog non-virtual.

webrtc/api/peerconnectioninterface.h

 /*
  *  Copyright 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 476 matching lines @@
   // Returns the current IceState.
   virtual IceState ice_state() = 0;
   virtual IceConnectionState ice_connection_state() = 0;
   virtual IceGatheringState ice_gathering_state() = 0;
 
   // Starts RtcEventLog using existing file. Takes ownership of |file| and
   // passes it on to Call, which will take the ownership. If the
   // operation fails the file will be closed. The logging will stop
   // automatically after 10 minutes have passed, or when the StopRtcEventLog
   // function is called.
-  // TODO(ivoc): Make this pure virtual when Chrome is updated.
   virtual bool StartRtcEventLog(rtc::PlatformFile file,
-                                int64_t max_size_bytes) {
-    return false;
-  }
+                                int64_t max_size_bytes) = 0;
 
   // Stops logging the RtcEventLog.
-  // TODO(ivoc): Make this pure virtual when Chrome is updated.
-  virtual void StopRtcEventLog() {}
+  virtual void StopRtcEventLog() = 0;
 
   // Terminates all media and closes the transport.
   virtual void Close() = 0;
 
  protected:
   // Dtor protected as objects shouldn't be deleted via this interface.
   ~PeerConnectionInterface() {}
 };
 
 // PeerConnection callback interface. Application should implement these
@@ skipping 214 matching lines @@
     cricket::WebRtcVideoEncoderFactory* encoder_factory,
     cricket::WebRtcVideoDecoderFactory* decoder_factory) {
   return CreatePeerConnectionFactory(
       worker_and_network_thread, worker_and_network_thread, signaling_thread,
       default_adm, encoder_factory, decoder_factory);
 }
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_API_PEERCONNECTIONINTERFACE_H_