gfx: Add FrameTime and DisplayTime classes

cc/scheduler/scheduler.h

Index: cc/scheduler/scheduler.h
diff --git a/cc/scheduler/scheduler.h b/cc/scheduler/scheduler.h
index 1a284f187d5c1ac2193fcf7e9baf1c24d0c6ae73..f04a8883f0e7e90ba1a81dbca8144ac15783635e 100644
--- a/cc/scheduler/scheduler.h
+++ b/cc/scheduler/scheduler.h
@@ -44,12 +44,13 @@ class SchedulerClient {
   virtual void ScheduledActionBeginOutputSurfaceCreation() = 0;
   virtual void ScheduledActionAcquireLayerTexturesForMainThread() = 0;
   virtual void ScheduledActionManageTiles() = 0;
-  virtual void DidAnticipatedDrawTimeChange(base::TimeTicks time) = 0;
+  virtual void DidAnticipatedDrawTimeChange(gfx::FrameTime time) = 0;
   virtual base::TimeDelta DrawDurationEstimate() = 0;
   virtual base::TimeDelta BeginMainFrameToCommitDurationEstimate() = 0;
   virtual base::TimeDelta CommitToActivateDurationEstimate() = 0;
-  virtual void PostBeginImplFrameDeadline(const base::Closure& closure,
-                                          base::TimeTicks deadline) = 0;
+  virtual void PostBeginImplFrameDeadline(
+      const base::Closure& closure,
+      gfx::FrameTime deadline) = 0;
   virtual void DidBeginImplFrameDeadline() = 0;
 
  protected:
@@ -105,9 +106,9 @@ class CC_EXPORT Scheduler {
 
   bool WillDrawIfNeeded() const;
 
-  base::TimeTicks AnticipatedDrawTime();
+  gfx::FrameTime AnticipatedDrawTime();
 
-  base::TimeTicks LastBeginImplFrameTime();
+  gfx::FrameTime LastBeginImplFrameTime();
 
   void BeginImplFrame(const BeginFrameArgs& args);
   void OnBeginImplFrameDeadline();
@@ -125,7 +126,7 @@ class CC_EXPORT Scheduler {
   Scheduler(SchedulerClient* client,
             const SchedulerSettings& scheduler_settings);
 
-  void PostBeginImplFrameDeadline(base::TimeTicks deadline);
+  void PostBeginImplFrameDeadline(gfx::FrameTime deadline);
   void SetupNextBeginImplFrameIfNeeded();
   void ActivatePendingTree();
   void DrawAndSwapIfPossible();