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

chrome/browser/ui/cocoa/tabs/tab_controller.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_TAB_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_TABS_TAB_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 #include "base/memory/scoped_ptr.h"
 #import "chrome/browser/ui/cocoa/hover_close_button.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_drag_controller.h"
 #include "chrome/browser/ui/tabs/tab_menu_model.h"
 #include "url/gurl.h"
 
 // The loading/waiting state of the tab.
 enum TabLoadingState {
   kTabDone,
   kTabLoading,
   kTabWaiting,
   kTabCrashed,
 };
 
-@class MediaIndicatorView;
+@class MediaIndicatorButton;
 @class MenuController;
 namespace TabControllerInternal {
 class MenuDelegate;
 }
 @class SpriteView;
 @class TabView;
 @protocol TabControllerTarget;
 
 // A class that manages a single tab in the tab strip. Set its target/action
 // to be sent a message when the tab is selected by the user clicking. Setting
 // the |loading| property to YES visually indicates that this tab is currently
 // loading content via a spinner.
 //
 // The tab has the notion of an "icon view" which can be used to display
 // identifying characteristics such as a favicon, or since it's a full-fledged
 // view, something with state and animation such as a throbber for illustrating
 // progress. The default in the nib is an image view so nothing special is
 // required if that's all you need.
 
 @interface TabController : NSViewController<TabDraggingEventTarget> {
  @private
   base::scoped_nsobject<SpriteView> iconView_;
-  base::scoped_nsobject<MediaIndicatorView> mediaIndicatorView_;
+  base::scoped_nsobject<MediaIndicatorButton> mediaIndicatorButton_;
   base::scoped_nsobject<HoverCloseButton> closeButton_;
 
   NSRect originalIconFrame_;  // frame of iconView_ as loaded from nib
   BOOL isIconShowing_;  // last state of iconView_ in updateVisibility
 
   BOOL app_;
   BOOL mini_;
   BOOL pinned_;
   BOOL active_;
   BOOL selected_;
@@ skipping 14 matching lines @@
 @property(assign, nonatomic) BOOL pinned;
 @property(assign, nonatomic) NSString* toolTip;
 // Note that |-selected| will return YES if the controller is |-active|, too.
 // |-setSelected:| affects the selection, while |-setActive:| affects the key
 // status/focus of the content.
 @property(assign, nonatomic) BOOL active;
 @property(assign, nonatomic) BOOL selected;
 @property(assign, nonatomic) id target;
 @property(assign, nonatomic) GURL url;
 @property(readonly, nonatomic) NSView* iconView;
-@property(assign, nonatomic) MediaIndicatorView* mediaIndicatorView;
+@property(readonly, nonatomic) MediaIndicatorButton* mediaIndicatorButton;
 @property(readonly, nonatomic) HoverCloseButton* closeButton;
 
 // Minimum and maximum allowable tab width. The minimum width does not show
 // the icon or the close button. The active tab always has at least a close
 // button so it has a different minimum width.
 + (CGFloat)minTabWidth;
 + (CGFloat)maxTabWidth;
 + (CGFloat)minActiveTabWidth;
 + (CGFloat)miniTabWidth;
 + (CGFloat)appTabWidth;
@@ skipping 31 matching lines @@
 @end
 
 @interface TabController(TestingAPI)
 - (int)iconCapacity;
 - (BOOL)shouldShowIcon;
 - (BOOL)shouldShowMediaIndicator;
 - (BOOL)shouldShowCloseButton;
 @end  // TabController(TestingAPI)
 
 #endif  // CHROME_BROWSER_UI_COCOA_TABS_TAB_CONTROLLER_H_