[rAc OSX] Animate the dots in the "Loading ..." message.

chrome/browser/ui/autofill/loading_animation.h

 // Copyright 2013 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 CHROME_BROWSER_UI_AUTOFILL_LOADING_ANIMATION_H_
 #define CHROME_BROWSER_UI_AUTOFILL_LOADING_ANIMATION_H_
 
 #include "ui/gfx/animation/linear_animation.h"
 
 namespace autofill {
 
 // An animation for a dancing ellipsis.
 class LoadingAnimation : public gfx::LinearAnimation {
  public:
-  explicit LoadingAnimation(gfx::AnimationDelegate* delegate);
+  explicit LoadingAnimation(gfx::AnimationDelegate* delegate,
+                            int font_height);
   virtual ~LoadingAnimation();
 
   // gfx::Animation implementation.
   virtual void Step(base::TimeTicks time_now) OVERRIDE;
 
   // Returns the vertical pixel offset for the nth dot.
-  double GetCurrentValueForDot(size_t dot_i);
+  double GetCurrentValueForDot(size_t dot_i) const;
 
   // Stops this animation. Use this instead of Stop() to make sure future
   // runs don't mess up on the first cycle.
   void Reset();
 
  private:
   // Describes a frame of the animation, a la -webkit-keyframes.
   struct AnimationFrame {
     double value;
     double position;
   };
 
   // True if the current cycle is the first one since Reset() was last called.
   bool first_cycle_;
+
+  // The font height of the loading text, which gives the factor by which to
+  // scale the animation.
+  const int font_height_;
 };
 
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_UI_AUTOFILL_LOADING_ANIMATION_H_