gfx: Add FrameTime and DisplayTime classes

cc/trees/thread_proxy.h

Index: cc/trees/thread_proxy.h
diff --git a/cc/trees/thread_proxy.h b/cc/trees/thread_proxy.h
index 2a48e941ac402640595b9d81398a660954a2dc58..3c3673d2400a71ac1bbd91842f6093940b007d76 100644
--- a/cc/trees/thread_proxy.h
+++ b/cc/trees/thread_proxy.h
@@ -104,12 +104,14 @@ class ThreadProxy : public Proxy,
   virtual void ScheduledActionBeginOutputSurfaceCreation() OVERRIDE;
   virtual void ScheduledActionAcquireLayerTexturesForMainThread() OVERRIDE;
   virtual void ScheduledActionManageTiles() OVERRIDE;
-  virtual void DidAnticipatedDrawTimeChange(base::TimeTicks time) OVERRIDE;
+  virtual void DidAnticipatedDrawTimeChange(gfx::FrameTime time)
+      OVERRIDE;
   virtual base::TimeDelta DrawDurationEstimate() OVERRIDE;
   virtual base::TimeDelta BeginMainFrameToCommitDurationEstimate() OVERRIDE;
   virtual base::TimeDelta CommitToActivateDurationEstimate() OVERRIDE;
-  virtual void PostBeginImplFrameDeadline(const base::Closure& closure,
-                                          base::TimeTicks deadline) OVERRIDE;
+  virtual void PostBeginImplFrameDeadline(
+     const base::Closure& closure,
+     gfx::FrameTime deadline) OVERRIDE;
   virtual void DidBeginImplFrameDeadline() OVERRIDE;
 
   // ResourceUpdateControllerClient implementation
@@ -123,7 +125,7 @@ class ThreadProxy : public Proxy,
     BeginMainFrameAndCommitState();
     ~BeginMainFrameAndCommitState();
 
-    base::TimeTicks monotonic_frame_begin_time;
+    gfx::FrameTime monotonic_frame_begin_time;
     scoped_ptr<ScrollAndScaleSet> scroll_info;
     size_t memory_allocation_limit_bytes;
     int memory_allocation_priority_cutoff;