Changes the OnClick behavior in message center.

chrome/browser/ui/views/ash/balloon_collection_impl_ash.cc

 // 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.
 
 #include "chrome/browser/ui/views/ash/balloon_collection_impl_ash.h"
 
 #include "ash/shell.h"
 #include "ash/system/web_notification/web_notification_tray.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/notifications/balloon.h"
@@ skipping 65 matching lines @@
     chrome::ShowExtensions(browser);
   else
     chrome::ShowContentSettings(browser, CONTENT_SETTINGS_TYPE_NOTIFICATIONS);
 }
 
 void BalloonCollectionImplAsh::OnClicked(const std::string& notification_id) {
   Balloon* balloon = base().FindBalloonById(notification_id);
   if (!balloon)
     return;
   balloon->OnClick();
-  RemoveById(notification_id);
 }
 
 void BalloonCollectionImplAsh::OnButtonClicked(
     const std::string& notification_id, int button_index) {
   Balloon* balloon = base().FindBalloonById(notification_id);
   if (balloon)
     balloon->OnButtonClick(button_index);
 }
 
 bool BalloonCollectionImplAsh::AddWebUIMessageCallback(
@@ skipping 48 matching lines @@
   return extension_service->extensions()->GetExtensionOrAppByURL(
       ExtensionURLInfo(origin));
 }
 
 #if defined(OS_CHROMEOS)
 // static
 BalloonCollection* BalloonCollection::Create() {
   return new BalloonCollectionImplAsh();
 }
 #endif