Indicate in the Window menu which Chrome window has an active sound playing

chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_controller.h"
 
 #import <QuartzCore/QuartzCore.h>
 
 #include <cmath>
 #include <limits>
@@ skipping 233 matching lines @@
 - (NSInteger)numberOfOpenPinnedTabs;
 - (NSInteger)numberOfOpenNonPinnedTabs;
 - (void)mouseMoved:(NSEvent*)event;
 - (void)setTabTrackingAreasEnabled:(BOOL)enabled;
 - (void)droppingURLsAt:(NSPoint)point
             givesIndex:(NSInteger*)index
            disposition:(WindowOpenDisposition*)disposition;
 - (void)setNewTabButtonHoverState:(BOOL)showHover;
 - (void)themeDidChangeNotification:(NSNotification*)notification;
 - (void)setNewTabImages;
+- (void)updateWindowMediaState:(TabMediaState)media_state
+                               on:(content::WebContents*)changed;

[Robert Sesek, 2015/10/20 13:39:48]

nit: align colons

 @end
 
 // A simple view class that contains the traffic light buttons. This class
 // ensures that the buttons display the icons when the mouse hovers over
 // them by overriding the _mouseInGroup method.
 @interface CustomWindowControlsView : NSView {
  @private
   BOOL mouseInside_;
 }
 
@@ skipping 1355 matching lines @@
       } else if (newState == kTabCrashed) {
         [tabController setIconImage:sadFaviconImage withToastAnimation:YES];
       } else {
         [tabController setIconImage:throbberImage];
       }
     } else {
       [tabController setIconImage:nil];
     }
   }
 
-  [tabController setMediaState:chrome::GetTabMediaStateForContents(contents)];
+  TabMediaState media_state = chrome::GetTabMediaStateForContents(contents);

[Robert Sesek, 2015/10/20 13:39:48]

naming: mediaState

+
+  [self updateWindowMediaState:media_state on:contents];
+  [tabController setMediaState:media_state];
 
   [tabController updateVisibility];
 }
 
 // Called when a notification is received from the model that the given tab
 // has been updated. |loading| will be YES when we only want to update the
 // throbber state, not anything else about the (partially) loading tab.
 - (void)tabChangedWithContents:(content::WebContents*)contents
                        atIndex:(NSInteger)modelIndex
                     changeType:(TabStripModelObserver::TabChangeType)change {
@@ skipping 687 matching lines @@
     [[newTabButton_ cell] setImage:Overlay(background, hover, alpha)
                     forButtonState:image_button_cell::kHoverStateBackground];
   } else {
     [[newTabButton_ cell] setImage:nil
                     forButtonState:image_button_cell::kDefaultStateBackground];
     [[newTabButton_ cell] setImage:nil
                     forButtonState:image_button_cell::kHoverStateBackground];
   }
 }
 
+- (void)updateWindowMediaState:(TabMediaState)media_state
+                               on:(content::WebContents*)selected {
+  NSWindow* window = [tabStripView_ window];
+  BrowserWindowController* windowController =
+        [BrowserWindowController browserWindowControllerForWindow:window];
+  [windowController setMediaState:media_state on:selected];
+}
+
 @end