html_viewer: Add a mock WebNotificationManager.

mojo/services/html_viewer/webnotificationmanager_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 MOJO_SERVICES_HTML_VIEWER_WEBNOTIFICATIONMANAGER_IMPL_H_
+#define MOJO_SERVICES_HTML_VIEWER_WEBNOTIFICATIONMANAGER_IMPL_H_
+
+#include "third_party/WebKit/public/platform/modules/notifications/WebNotificationManager.h"
+
+namespace html_viewer {
+
+// TODO(erg): This class is currently a stub; blink expects this object to
+// exist, and several websites will trigger notifications these days.
+class WebNotificationManagerImpl : public blink::WebNotificationManager {
+ public:
+  WebNotificationManagerImpl();
+  ~WebNotificationManagerImpl() override;
+
+  // blink::WebNotificationManager methods:
+  void show(const blink::WebSerializedOrigin&,
+            const blink::WebNotificationData&,
+            blink::WebNotificationDelegate*) override;
+  void showPersistent(const blink::WebSerializedOrigin&,
+                      const blink::WebNotificationData&,
+                      blink::WebServiceWorkerRegistration*,
+                      blink::WebNotificationShowCallbacks*) override;
+  void getNotifications(const blink::WebString& filterTag,
+                        blink::WebServiceWorkerRegistration*,
+                        blink::WebNotificationGetCallbacks*) override;
+  void close(blink::WebNotificationDelegate*) override;
+  void closePersistent(const blink::WebSerializedOrigin&,
+                       int64_t persistentNotificationId) override;
+  void closePersistent(const blink::WebSerializedOrigin&,
+                       const blink::WebString& persistentNotificationId)
+      override;
+  void notifyDelegateDestroyed(blink::WebNotificationDelegate*) override;
+  blink::WebNotificationPermission checkPermission(
+      const blink::WebSerializedOrigin&) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WebNotificationManagerImpl);
+};
+
+}  // namespace html_viewer
+
+#endif  // MOJO_SERVICES_HTML_VIEWER_WEBNOTIFICATIONMANAGER_IMPL_H_