Mac: Audio indicator in each tab

chrome/browser/ui/cocoa/tabs/throbbing_image_view.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 CHROME_BROWSER_UI_COCOA_TABS_THROBBING_IMAGE_VIEW_H_
 #define CHROME_BROWSER_UI_COCOA_TABS_THROBBING_IMAGE_VIEW_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/memory/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/base/animation/throb_animation.h"
 
 class ThrobbingImageViewAnimationDelegate;
 
 @interface ThrobbingImageView : NSView {
  @protected
   scoped_nsobject<NSImage> backgroundImage_;
   scoped_nsobject<NSImage> throbImage_;
   scoped_ptr<ui::ThrobAnimation> throbAnimation_;
 
  @private
   scoped_ptr<ThrobbingImageViewAnimationDelegate> delegate_;
 }
 
 - (id)initWithFrame:(NSRect)rect
     backgroundImage:(NSImage*)backgroundImage
          throbImage:(NSImage*)throbImage
          durationMS:(int)durationMS;
+
+- (void)setTweenType:(ui::Tween::Type)type;
+
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_TABS_THROBBING_IMAGE_VIEW_H_