[MC] Add the product name to the tray controller's title.

ui/message_center/cocoa/tray_view_controller.h

Index: ui/message_center/cocoa/tray_view_controller.h
diff --git a/ui/message_center/cocoa/tray_view_controller.h b/ui/message_center/cocoa/tray_view_controller.h
index e1e9ca2fe45b7d6c07ad36a5c339619cc2dc6166..cb9379b877c8eaf5b00641fcee9bfcda953097d3 100644
--- a/ui/message_center/cocoa/tray_view_controller.h
+++ b/ui/message_center/cocoa/tray_view_controller.h
@@ -13,6 +13,7 @@
 
 #include "base/mac/scoped_block.h"
 #import "base/mac/scoped_nsobject.h"
+#include "base/strings/string16.h"
 #include "ui/message_center/message_center_export.h"
 
 @class HoverImageButton;
@@ -107,6 +108,9 @@ MESSAGE_CENTER_EXPORT
       testingAnimationEndedCallback_;
 }
 
+// The title that is displayed at the top of the message center tray.
+@property(copy, nonatomic) NSString* trayTitle;
+
 // Designated initializer.
 - (id)initWithMessageCenter:(message_center::MessageCenter*)messageCenter;