[Cocoa] Tab audio mute control, behind a switch (off by default).

chrome/browser/ui/cocoa/tabs/media_indicator_view.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_COCOA_TABS_MEDIA_INDICATOR_VIEW_H_
-#define CHROME_BROWSER_UI_COCOA_TABS_MEDIA_INDICATOR_VIEW_H_
-
-#import <Cocoa/Cocoa.h>
-
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/ui/tabs/tab_utils.h"
-
-class MediaIndicatorViewAnimationDelegate;
-
-namespace gfx {
-class Animation;
-}  // namespace gfx
-
-@interface MediaIndicatorView : NSImageView {
- @private
-  TabMediaState mediaState_;
-  scoped_ptr<MediaIndicatorViewAnimationDelegate> delegate_;
-  scoped_ptr<gfx::Animation> animation_;
-  TabMediaState animatingMediaState_;
-}
-
-@property(readonly, nonatomic) TabMediaState mediaState;
-@property(readonly, nonatomic) TabMediaState animatingMediaState;
-
-// Initialize a new MediaIndicatorView in TAB_MEDIA_STATE_NONE (i.e., a
-// non-active indicator).
-- (id)init;
-
-// Starts the animation to transition the indicator to the new |mediaState|.
-- (void)updateIndicator:(TabMediaState)mediaState;
-
-// Register a callback to be invoked whenever the animation completes.
-- (void)setAnimationDoneCallbackObject:(id)anObject withSelector:(SEL)selector;
-
-@end
-
-@interface MediaIndicatorView(TestingAPI)
-// Turns off animations for logic testing.
-- (void)disableAnimations;
-@end
-
-#endif  // CHROME_BROWSER_UI_COCOA_TABS_MEDIA_INDICATOR_VIEW_H_