Removed emojis from generated_resources.grd and update the code.

chrome/browser/ui/cocoa/tabs/tab_strip_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_STRIP_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_TABS_TAB_STRIP_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #import "chrome/browser/ui/cocoa/has_weak_browser_pointer.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_controller_target.h"
 #import "chrome/browser/ui/cocoa/url_drop_target.h"
 #include "chrome/browser/ui/tabs/hover_tab_selector.h"
+#include "chrome/browser/ui/tabs/tab_utils.h"
 
 @class CrTrackingArea;
 @class CustomWindowControlsView;
 @class NewTabButton;
 @class TabContentsController;
 @class TabView;
 @class TabStripDragController;
 @class TabStripView;
 
 class Browser;
@@ skipping 234 matching lines @@
 
 // Returns the currently active TabContentsController.
 - (TabContentsController*)activeTabContentsController;
 
 // Adds custom traffic light buttons to the tab strip. Idempotent.
 - (void)addCustomWindowControls;
 
 // Removes custom traffic light buttons from the tab strip. Idempotent.
 - (void)removeCustomWindowControls;
 
+// Gets the tab and the media state to check whether the window
+// media state should be updated or not. If the tab media state is
+// AUDIO_PLAYING, the window media state should be set to AUDIO_PLAYING.
+// If the tab media state is AUDIO_MUTING, this method would check if the
+// window has no other tab with state AUDIO_PLAYING, then the window
+// media state will be set to AUDIO_MUTING. If the tab media state is NONE,
+// this method checks if the window has no playing or muting tab, then window
+// media state will be set as NONE.
+- (void)updateWindowMediaState:(TabMediaState)mediaState
+                            on:(content::WebContents*)changed;

[Robert Sesek, 2015/11/09 23:41:25]

naming: instead of just "on:", this would be more descriptive as
"forWebContents:"

+
+// Returns the media state associated with the contents.
+- (TabMediaState)mediaStateForContents:(content::WebContents*)contents;
+
 @end
 
 @interface TabStripController(TestingAPI)
 - (void)setTabTitle:(TabController*)tab
        withContents:(content::WebContents*)contents;
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_TABS_TAB_STRIP_CONTROLLER_H_