Move RTCDataChannel timer to frame-specific TaskRunnerTimer.

third_party/WebKit/Source/modules/peerconnection/RTCDataChannel.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 117 matching lines @@
   void scheduleDispatchEvent(Event*);
   void scheduledEventTimerFired(TimerBase*);
 
   std::unique_ptr<WebRTCDataChannelHandler> m_handler;
 
   WebRTCDataChannelHandlerClient::ReadyState m_readyState;
 
   enum BinaryType { BinaryTypeBlob, BinaryTypeArrayBuffer };
   BinaryType m_binaryType;
 
-  Timer<RTCDataChannel> m_scheduledEventTimer;
+  TaskRunnerTimer<RTCDataChannel> m_scheduledEventTimer;
   HeapVector<Member<Event>> m_scheduledEvents;
 
   unsigned m_bufferedAmountLowThreshold;
 
   bool m_stopped;
 
   FRIEND_TEST_ALL_PREFIXES(RTCDataChannelTest, BufferedAmountLow);
 };
 
 }  // namespace blink
 
 #endif  // RTCDataChannel_h