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

content/shell/renderer/layout_test/webkit_test_runner.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.
 
 #ifndef CONTENT_SHELL_WEBKIT_TEST_RUNNER_H_
 #define CONTENT_SHELL_WEBKIT_TEST_RUNNER_H_
 
 #include <vector>
 
 #include "base/files/file_path.h"
@@ skipping 75 matching lines @@
                     const std::string& frontend_url) override;
   void CloseDevTools() override;
   void EvaluateInWebInspector(long call_id, const std::string& script) override;
   void ClearAllDatabases() override;
   void SetDatabaseQuota(int quota) override;
   blink::WebNotificationPresenter::Permission CheckWebNotificationPermission(
       const GURL& origin) override;
   void GrantWebNotificationPermission(const GURL& origin,
                                       bool permission_granted) override;
   void ClearWebNotificationPermissions() override;
+  void SimulateWebNotificationClick(const std::string& title) override;
   void SetDeviceScaleFactor(float factor) override;
   void SetDeviceColorProfile(const std::string& name) override;
   void SetFocus(WebTestProxyBase* proxy, bool focus) override;
   void SetAcceptAllCookies(bool accept) override;
   std::string PathToLocalResource(const std::string& resource) override;
   void SetLocale(const std::string& locale) override;
   void TestFinished() override;
   void CloseRemainingWindows() override;
   void DeleteAllCookies() override;
   int NavigationEntryCount() override;
@@ skipping 46 matching lines @@
 
   scoped_ptr<LeakDetector> leak_detector_;
   bool needs_leak_detector_;
 
   DISALLOW_COPY_AND_ASSIGN(WebKitTestRunner);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_WEBKIT_TEST_RUNNER_H_