Implement a permission check for push.

chrome/browser/services/gcm/gcm_permission_context_factory.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 CHROME_BROWSER_SERVICES_GCM_GCM_PERMISSION_CONTEXT_FACTORY_H_
+#define CHROME_BROWSER_SERVICES_GCM_GCM_PERMISSION_CONTEXT_FACTORY_H_
+
+#include "base/memory/singleton.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+
+class Profile;
+
+namespace gcm {
+
+class GCMPermissionContext;
+
+class GCMPermissionContextFactory : public BrowserContextKeyedServiceFactory {
+ public:
+  static GCMPermissionContext* GetForProfile(Profile* profile);
+  static GCMPermissionContextFactory* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<GCMPermissionContextFactory>;
+
+  GCMPermissionContextFactory();
+  virtual ~GCMPermissionContextFactory();
+
+  // BrowserContextKeyedBaseFactory methods:
+  virtual KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* profile) const OVERRIDE;
+  virtual content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(GCMPermissionContextFactory);
+};
+
+}  // namespace gcm
+#endif  // CHROME_BROWSER_SERVICES_GCM_GCM_PERMISSION_CONTEXT_FACTORY_H_