Revert 237857 "Revert 237848 "Use LatencyInfoSwapPromise to trac..."

trunk/src/cc/base/latency_info_swap_promise.h

 // Copyright 2013 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 CC_BASE_LATENCY_INFO_SWAP_PROMISE_H_
 #define CC_BASE_LATENCY_INFO_SWAP_PROMISE_H_
 
 #include "base/compiler_specific.h"
 #include "cc/base/swap_promise.h"
 #include "ui/events/latency_info.h"
 
 namespace cc {
 
 class CC_EXPORT LatencyInfoSwapPromise : public SwapPromise {
  public:
   explicit LatencyInfoSwapPromise(const ui::LatencyInfo& latency_info);
   virtual ~LatencyInfoSwapPromise();
 
   virtual void DidSwap(CompositorFrameMetadata* metadata) OVERRIDE;
   virtual void DidNotSwap(DidNotSwapReason reason) OVERRIDE;
 
  private:
   ui::LatencyInfo latency_;
 };
 
 }  // namespace cc
 
 #endif  // CC_BASE_LATENCY_INFO_SWAP_PROMISE_H_