Add support for Ash to Notifications

chrome/browser/notifications/balloon_collection_base.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.
 
 // Handles the visible notification (or balloons).
 
 #ifndef CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_BASE_H_
 #define CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_BASE_H_
 #pragma once
 
@@ skipping 30 matching lines @@
   // Finds all balloons matching the given notification source,
   // and calls CloseByScript on them.  Returns true if anything
   // was found.
   virtual bool CloseAllBySourceOrigin(const GURL& source_origin);
 
   // Calls CloseByScript on all balloons.
   virtual void CloseAll();
 
   const Balloons& balloons() const { return balloons_; }
 
+  // Returns the balloon matching the given notification id, or
+  // NULL if there is no matching balloon.
+  Balloon* FindBalloonById(const std::string& notification_id);
+
   // Returns the balloon matching the given notification, or
   // NULL if there is no matching balloon.
   Balloon* FindBalloon(const Notification& notification);
 
   // The number of balloons being displayed.
   int count() const { return static_cast<int>(balloons_.size()); }
 
  private:
   // Queue of active balloons.  Pointers are owned by this class.
   Balloons balloons_;
 
   DISALLOW_COPY_AND_ASSIGN(BalloonCollectionBase);
 };
 
 #endif  // CHROME_BROWSER_NOTIFICATIONS_BALLOON_COLLECTION_BASE_H_