Adds AnimationContainer, which can be used to group a set of

app/throb_animation.h

 // Copyright (c) 2006-2008 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 APP_THROB_ANIMATION_H_
 #define APP_THROB_ANIMATION_H_
 
 #include "app/slide_animation.h"
 
 // A subclass of SlideAnimation that can continually slide. All of the Animation
@@ skipping 13 matching lines @@
   void StartThrobbing(int cycles_til_stop);
 
   // Sets the duration of the slide animation when throbbing.
   void SetThrobDuration(int duration) { throb_duration_ = duration; }
 
   // Overridden to reset to the slide duration.
   virtual void Reset();
   virtual void Show();
   virtual void Hide();
 
-  // Overriden to continually throb (assuming we're throbbing).
-  virtual void Step();
-
   // Overridden to maintain the slide duration.
   virtual void SetSlideDuration(int duration) { slide_duration_ = duration; }
 
   // 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);
+
  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);
 };
 
 #endif  // APP_THROB_ANIMATION_H_