Removed emojis from generated_resources.grd and update the code.

chrome/browser/ui/cocoa/browser_window_cocoa.mm

Index: chrome/browser/ui/cocoa/browser_window_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_cocoa.mm b/chrome/browser/ui/cocoa/browser_window_cocoa.mm
index 028c744d53dd56751ccc7c2e29262a534a056ffc..20635415dc9f870d1a5443d4824ded7f6c7936f2 100644
--- a/chrome/browser/ui/cocoa/browser_window_cocoa.mm
+++ b/chrome/browser/ui/cocoa/browser_window_cocoa.mm
@@ -296,13 +296,27 @@ StatusBubble* BrowserWindowCocoa::GetStatusBubble() {
 }
 
 void BrowserWindowCocoa::UpdateTitleBar() {
-  NSString* newTitle =
-      base::SysUTF16ToNSString(browser_->GetWindowTitleForCurrentTab());
-
-  pending_window_title_.reset(
-      [BrowserWindowUtils scheduleReplaceOldTitle:pending_window_title_.get()
-                                     withNewTitle:newTitle
-                                        forWindow:window()]);
+  NSString* newTitle = WindowTitle();
+
+  pending_window_title_.reset([BrowserWindowUtils
+      scheduleReplaceOldTitle:pending_window_title_.get()
+                 withNewTitle:newTitle
+                    forWindow:window()]);
+}
+
+NSString* BrowserWindowCocoa::WindowTitle() {
+  if (media_state_ == TAB_MEDIA_STATE_AUDIO_PLAYING) {
+    NSString* playing_emoji = [[NSString alloc] initWithString:@"🔊"];

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

This is leaked (alloc with no release). You can just use @"" literals to
SysNSStringToUTF16.

+    return l10n_util::GetNSStringF(IDS_WINDOW_AUDIO_PLAYING_MAC,
+                                   browser_->GetWindowTitleForCurrentTab(),
+                                   base::SysNSStringToUTF16(playing_emoji));
+  } else if (media_state_ == TAB_MEDIA_STATE_AUDIO_MUTING) {
+    NSString* muting_emoji = [[NSString alloc] initWithString:@"🔇"];
+    return l10n_util::GetNSStringF(IDS_WINDOW_AUDIO_MUTING_MAC,
+                                   browser_->GetWindowTitleForCurrentTab(),
+                                   base::SysNSStringToUTF16(muting_emoji));
+  }
+  return base::SysUTF16ToNSString(browser_->GetWindowTitleForCurrentTab());
 }
 
 void BrowserWindowCocoa::BookmarkBarStateChanged(
@@ -541,6 +555,11 @@ void BrowserWindowCocoa::AddFindBar(
   [controller_ addFindBar:find_bar_cocoa_controller];
 }
 
+void BrowserWindowCocoa::UpdateMediaState(TabMediaState media_state) {
+  media_state_ = media_state;
+  UpdateTitleBar();
+}
+
 void BrowserWindowCocoa::ShowUpdateChromeDialog() {
   restart_browser::RequestRestart(window());
 }