Implement a permission check for push.

chrome/browser/services/gcm/permission_context_base.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_PERMISSION_CONTEXT_BASE_H_
+#define CHROME_BROWSER_SERVICES_GCM_PERMISSION_CONTEXT_BASE_H_
+
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+#include "chrome/common/content_settings_types.h"
+#include "components/keyed_service/core/keyed_service.h"
+
+class GURL;
+class PermissionQueueController;
+class PermissionRequestID;
+class Profile;
+
+namespace content {
+class WebContents;
+}
+
+typedef base::Callback<void(bool)> BrowserPermissionCallback;
+
+// TODO(miguelg) Move this out of gcm into a generic place and make
+// Midi permissions and others use it.
+namespace gcm {
+
+// This base class contains common operations for grating permissions.
+// It is spit out of Midi and Push and will be moved to a common place
+// so it can be used by both classes (and eventually others) in a separate
+// patch.
+class PermissionContextBase : public KeyedService {
+ public:
+  PermissionContextBase(Profile* profile,
+                        const ContentSettingsType permission_type);
+  virtual ~PermissionContextBase();
+
+  // The renderer is requesting permission to push messages.
+  // When the answer to a permission request has been determined, |callback|
+  // should be called with the result.
+  virtual void RequestPermission(content::WebContents* web_contents,
+                                 const PermissionRequestID& id,
+                                 const GURL& requesting_frame,
+                                 bool user_gesture,
+                                 const BrowserPermissionCallback& callback);
+
+ protected:
+  // Decide whether the permission should be granted.
+  // Calls PermissionDecided if permission can be decided non-interactively,
+  // or NotifyPermissionSet if permission decided by presenting an infobar.
+  void DecidePermission(content::WebContents* web_contents,
+                        const PermissionRequestID& id,
+                        const GURL& requesting_frame,
+                        const GURL& embedder,
+                        bool user_gesture,
+                        const BrowserPermissionCallback& callback);
+
+  // Called when permission is granted without interactively asking the user.
+  void PermissionDecided(const PermissionRequestID& id,
+                         const GURL& requesting_frame,
+                         const GURL& embedder,
+                         const BrowserPermissionCallback& callback,
+                         bool allowed);
+
+  void NotifyPermissionSet(const PermissionRequestID& id,
+                           const GURL& requesting_frame,
+                           const BrowserPermissionCallback& callback,
+                           bool allowed);
+
+  // Implementors can override this method to update the icons on the
+  // url bar with the result of the new permission.
+  virtual void UpdateTabContext(const PermissionRequestID& id,
+                                const GURL& requesting_frame,
+                                bool allowed) {}
+
+  // Return an instance of the infobar queue controller, creating it if needed.
+  PermissionQueueController* GetQueueController();
+
+ private:
+  Profile* profile_;
+  const ContentSettingsType permission_type_;
+  scoped_ptr<PermissionQueueController> permission_queue_controller_;
+};
+}  // namespace gcm
+
+#endif  // CHROME_BROWSER_SERVICES_GCM_PERMISSION_CONTEXT_BASE_H_