gfx: Add FrameTime and DisplayTime classes

ui/gfx/animation/throb_animation.h

 // Copyright (c) 2012 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 UI_GFX_ANIMATION_THROB_ANIMATION_H_
 #define UI_GFX_ANIMATION_THROB_ANIMATION_H_
 
 #include "ui/gfx/animation/slide_animation.h"
 
 namespace gfx {
@@ skipping 25 matching lines @@
 
   // Overridden to maintain the slide duration.
   virtual void SetSlideDuration(int duration) OVERRIDE;
 
   // The number of cycles remaining until the animation stops.
   void set_cycles_remaining(int value) { cycles_remaining_ = value; }
   int cycles_remaining() const { return cycles_remaining_; }
 
  protected:
   // Overriden to continually throb (assuming we're throbbing).
-  virtual void Step(base::TimeTicks time_now) OVERRIDE;
+  virtual void Step(gfx::FrameTime time_now) OVERRIDE;
 
  private:
   // Resets state such that we behave like SlideAnimation.
   void ResetForSlide();
 
   // Duration of the slide animation.
   int slide_duration_;
 
   // Duration of the slide animation when throbbing.
   int throb_duration_;
 
   // If throbbing, this is the number of cycles left.
   int cycles_remaining_;
 
   // Are we throbbing?
   bool throbbing_;
 
   DISALLOW_COPY_AND_ASSIGN(ThrobAnimation);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_ANIMATION_THROB_ANIMATION_H_