Update Mac notification tray behavior.

ui/message_center/cocoa/status_item_view.h

 // Copyright (c) 2013 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 UI_MESSAGE_CENTER_COCOA_STATUS_ITEM_VIEW_H_
 #define UI_MESSAGE_CENTER_COCOA_STATUS_ITEM_VIEW_H_
 
 #import <AppKit/AppKit.h>
 
 #include "base/mac/scoped_block.h"
@@ skipping 17 matching lines @@
  @private
   // The status item.
   base::scoped_nsobject<NSStatusItem> statusItem_;
 
   // Callback issued when the status item is clicked.
   base::mac::ScopedBlock<message_center::StatusItemClickedCallack> callback_;
 
   // The unread count number to be drawn next to the icon.
   size_t unreadCount_;
 
+  // Whether or not we are to display the quiet mode version of the status icon.
+  BOOL quietMode_;
+
   // Whether or not to force the highlight pattern to be drawn.
   BOOL highlight_;
 
   // Whether or not the view is currently handling mouse events and should
   // draw the highlight pattern.
   BOOL inMouseEventSequence_;
 }
 
 @property(copy, nonatomic) message_center::StatusItemClickedCallack callback;
-@property(nonatomic) size_t unreadCount;
 @property(nonatomic) BOOL highlight;
 
 // Designated initializer. Creates a new NSStatusItem in the system menubar.
 - (id)init;
 
+// Sets the unread count and quiet mode status of the icon.
+- (void)setUnreadCount:(size_t)unreadCount withQuietMode:(BOOL)quietMode;
+
 // Removes the status item from the menubar. Must be called to break the
 // retain cycle between self and the NSStatusItem view.
 - (void)removeItem;
 
 @end
 
 #endif  // UI_MESSAGE_CENTER_COCOA_STATUS_ITEM_VIEW_H_