Implement the ability to layout test Web Worker-based Notifications.

content/shell/browser/layout_test/layout_test_content_browser_client.h

 // Copyright 2014 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 CONTENT_SHELL_BROWSER_LAYOUT_TEST_LAYOUT_TEST_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_SHELL_BROWSER_LAYOUT_TEST_LAYOUT_TEST_CONTENT_BROWSER_CLIENT_H_
 
 #include "content/shell/browser/shell_content_browser_client.h"
 
 namespace content {
@@ skipping 15 matching lines @@
   void RenderProcessWillLaunch(RenderProcessHost* host) override;
   void RequestDesktopNotificationPermission(
       const GURL& source_origin,
       RenderFrameHost* render_frame_host,
       const base::Callback<void(blink::WebNotificationPermission)>& callback)
       override;
   blink::WebNotificationPermission CheckDesktopNotificationPermission(
       const GURL& source_url,
       ResourceContext* context,
       int render_process_id) override;
+  void ShowDesktopNotification(
+      const ShowDesktopNotificationHostMsgParams& params,
+      RenderFrameHost* render_frame_host,
+      scoped_ptr<DesktopNotificationDelegate> delegate,
+      base::Closure* cancel_callback) override;
 
  private:
   scoped_ptr<LayoutTestNotificationManager> layout_test_notification_manager_;
 };
 
 }  // content
 
 #endif  // CONTENT_SHELL_BROWSER_LAYOUT_TEST_LAYOUT_TEST_CONTENT_BROWSER_CLIENT_H_