Implement HasPermission() method in PermissionService.

content/browser/permissions/permission_service_impl.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 CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_IMPL_H_
 #define CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_IMPL_H_
 
 #include "base/id_map.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 42 matching lines @@
       const mojo::Callback<void(PermissionStatus)>& callback) override;
 
   // mojo::InterfaceImpl.
   void OnConnectionError() override;
 
   void OnRequestPermissionResponse(
     const mojo::Callback<void(PermissionStatus)>& callback,
     int request_id,
     bool allowed);
 
+  void OnHasPermissionResponse(
+    const mojo::Callback<void(PermissionStatus)>& callback,
+    PermissionStatus content_setting);

[mlamouri (slow - plz ping), 2014/11/24 19:06:01]

nit: s/content_setting/permission_status/

[timvolodine, 2014/11/27 17:53:42]

Done.

+
   RequestsMap pending_requests_;
   // context_ owns |this|.
   PermissionServiceContext* context_;
   base::WeakPtrFactory<PermissionServiceImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PermissionServiceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_PERMISSIONS_PERMISSION_SERVICE_IMPL_H_