Add layout tests for ServiceWorker's notificationclose event.

components/html_viewer/web_test_delegate_impl.h

 // Copyright 2015 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 COMPONENTS_HTML_VIEWER_WEB_TEST_DELEGATE_IMPL_H_
 #define COMPONENTS_HTML_VIEWER_WEB_TEST_DELEGATE_IMPL_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "components/test_runner/test_preferences.h"
@@ skipping 54 matching lines @@
   void ClearDevToolsLocalStorage() override;
   void ShowDevTools(const std::string& settings,
                     const std::string& frontend_url) override;
   void CloseDevTools() override;
   void EvaluateInWebInspector(long call_id, const std::string& script) override;
   std::string EvaluateInWebInspectorOverlay(const std::string& script) override;
   void ClearAllDatabases() override;
   void SetDatabaseQuota(int quota) override;
   void SimulateWebNotificationClick(const std::string& title,
                                     int action_index) override;
+  void SimulateWebNotificationClose(const std::string& title,
+                                    bool by_user) override;
   void SetDeviceScaleFactor(float factor) override;
   void EnableUseZoomForDSF() override;
   void SetDeviceColorProfile(const std::string& name) override;
   void SetBluetoothMockDataSet(const std::string& data_set) override;
   void SetBluetoothManualChooser() override;
   void GetBluetoothManualChooserEvents(
       const base::Callback<void(const std::vector<std::string>&)>& callback)
       override;
   void SendBluetoothManualChooserEvent(const std::string& event,
                                        const std::string& argument) override;
@@ skipping 48 matching lines @@
   test_runner::WebTestInterfaces* test_interfaces_;
   test_runner::WebTestProxyBase* proxy_;
   base::Closure completion_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(WebTestDelegateImpl);
 };
 
 }  // namespace html_viewer
 
 #endif  // COMPONENTS_HTML_VIEWER_WEB_TEST_DELEGATE_IMPL_H_