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diff --git a/chromium/ui/gfx/animation/throb_animation.h b/chromium/ui/gfx/animation/throb_animation.h
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+++ b/chromium/ui/gfx/animation/throb_animation.h
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+// 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 {
+
+// A subclass of SlideAnimation that can continually slide. All of the Animation
+// methods behave like that of SlideAnimation: transition to the next state.
+// The StartThrobbing method causes the ThrobAnimation to cycle between hidden
+// and shown for a set number of cycles.
+//
+// A ThrobAnimation has two durations: the duration used when behavior like
+// a SlideAnimation, and the duration used when throbbing.
+class GFX_EXPORT ThrobAnimation : public SlideAnimation {
+ public:
+  explicit ThrobAnimation(AnimationDelegate* target);
+  virtual ~ThrobAnimation() {}
+
+  // Starts throbbing. cycles_til_stop gives the number of cycles to do before
+  // stopping. A negative value means "throb indefinitely".
+  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() OVERRIDE;
+  virtual void Reset(double value) OVERRIDE;
+  virtual void Show() OVERRIDE;
+  virtual void Hide() OVERRIDE;
+
+  // 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;
+
+ 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_