gfx: Add FrameTime and DisplayTime classes

cc/trees/single_thread_proxy.h

 // Copyright 2011 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_TREES_SINGLE_THREAD_PROXY_H_
 #define CC_TREES_SINGLE_THREAD_PROXY_H_
 
 #include <limits>
 
 #include "base/time/time.h"
@@ skipping 57 matching lines @@
       int priority_cutoff) OVERRIDE;
   virtual void ReduceWastedContentsTextureMemoryOnImplThread() OVERRIDE;
   virtual void SendManagedMemoryStats() OVERRIDE;
   virtual bool IsInsideDraw() OVERRIDE;
   virtual void RenewTreePriority() OVERRIDE {}
   virtual void RequestScrollbarAnimationOnImplThread(base::TimeDelta delay)
       OVERRIDE {}
   virtual void DidActivatePendingTree() OVERRIDE {}
 
   // Called by the legacy path where RenderWidget does the scheduling.
-  void CompositeImmediately(base::TimeTicks frame_begin_time);
+  void CompositeImmediately(gfx::FrameTime frame_begin_time);
 
  private:
   explicit SingleThreadProxy(LayerTreeHost* layer_tree_host);
 
   void OnOutputSurfaceInitializeAttempted(bool success);
-  bool CommitAndComposite(base::TimeTicks frame_begin_time,
+  bool CommitAndComposite(gfx::FrameTime frame_begin_time,
                           gfx::Rect device_viewport_damage_rect,
                           bool for_readback,
                           LayerTreeHostImpl::FrameData* frame);
   void DoCommit(scoped_ptr<ResourceUpdateQueue> queue);
-  bool DoComposite(
-      scoped_refptr<cc::ContextProvider> offscreen_context_provider,
-      base::TimeTicks frame_begin_time,
+  bool DoComposite(scoped_refptr<cc::ContextProvider> offscreen_context_provider,
+      gfx::FrameTime frame_begin_time,
       gfx::Rect device_viewport_damage_rect,
       bool for_readback,
       LayerTreeHostImpl::FrameData* frame);
   void DidSwapFrame();
 
   bool ShouldComposite() const;
   void UpdateBackgroundAnimateTicking();
 
   // Accessed on main thread only.
   LayerTreeHost* layer_tree_host_;
@@ skipping 72 matching lines @@
  private:
   DebugScopedSetImplThread impl_thread_;
   DebugScopedSetMainThreadBlocked main_thread_blocked_;
 
   DISALLOW_COPY_AND_ASSIGN(DebugScopedSetImplThreadAndMainThreadBlocked);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_SINGLE_THREAD_PROXY_H_