gfx: Add FrameTime and DisplayTime classes

ui/gfx/animation/throb_animation.cc

 // 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.
 
 #include "ui/gfx/animation/throb_animation.h"
 
 #include <limits>
 
 namespace gfx {
 
@@ skipping 39 matching lines @@
 
 void ThrobAnimation::Hide() {
   ResetForSlide();
   SlideAnimation::Hide();
 }
 
 void ThrobAnimation::SetSlideDuration(int duration) {
   slide_duration_ = duration;
 }
 
-void ThrobAnimation::Step(base::TimeTicks time_now) {
+void ThrobAnimation::Step(gfx::FrameTime time_now) {
   LinearAnimation::Step(time_now);
 
   if (!is_animating() && throbbing_) {
     // Were throbbing a finished a cycle. Start the next cycle unless we're at
     // the end of the cycles, in which case we stop.
     cycles_remaining_--;
     if (IsShowing()) {
       // We want to stop hidden, hence this doesn't check cycles_remaining_.
       SlideAnimation::Hide();
     } else if (cycles_remaining_ > 0) {
       SlideAnimation::Show();
     } else {
       // We're done throbbing.
       throbbing_ = false;
     }
   }
 }
 
 void ThrobAnimation::ResetForSlide() {
   SlideAnimation::SetSlideDuration(slide_duration_);
   cycles_remaining_ = 0;
   throbbing_ = false;
 }
 
 }  // namespace gfx