Revert of Implement scroll handler latency tracking

content/renderer/gpu/queue_message_swap_promise.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_QUEUE_MESSAGE_SWAP_PROMISE_H_
 #define CONTENT_RENDERER_QUEUE_MESSAGE_SWAP_PROMISE_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/swap_promise.h"
@@ skipping 11 matching lines @@
   QueueMessageSwapPromise(scoped_refptr<IPC::SyncMessageFilter> message_sender,
                           scoped_refptr<FrameSwapMessageQueue> message_queue,
                           int source_frame_number);
 
   virtual ~QueueMessageSwapPromise();
 
   virtual void DidSwap(cc::CompositorFrameMetadata* metadata) OVERRIDE;
 
   virtual void DidNotSwap(DidNotSwapReason reason) OVERRIDE;
 
-  virtual int64 TraceId() const OVERRIDE;
-
  private:
   void PromiseCompleted();
 
   scoped_refptr<IPC::SyncMessageFilter> message_sender_;
   scoped_refptr<content::FrameSwapMessageQueue> message_queue_;
   int source_frame_number_;
 #if DCHECK_IS_ON
   bool completed_;
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_QUEUE_MESSAGE_SWAP_PROMISE_H_