Implement basic mojo Permission service and use it for Geolocation.

content/renderer/geolocation_dispatcher.h

 // Copyright (c) 2012 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_RENDERER_GEOLOCATION_DISPATCHER_H_
 #define CONTENT_RENDERER_GEOLOCATION_DISPATCHER_H_
 
 #include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "content/common/geolocation_service.mojom.h"
+#include "content/common/permission_service.mojom.h"
 #include "content/public/renderer/render_frame_observer.h"
 #include "third_party/WebKit/public/web/WebGeolocationClient.h"
 #include "third_party/WebKit/public/web/WebGeolocationController.h"
 
 namespace blink {
 class WebGeolocationController;
 class WebGeolocationPermissionRequest;
 class WebGeolocationPermissionRequestManager;
 class WebGeolocationPosition;
 }
 
 namespace content {
 struct Geoposition;
 
 // GeolocationDispatcher is a delegate for Geolocation messages used by
 // WebKit.
 // It's the complement of GeolocationDispatcherHost.
 class GeolocationDispatcher
     : public RenderFrameObserver,
       public blink::WebGeolocationClient,
       public mojo::InterfaceImpl<GeolocationServiceClient> {
  public:
   explicit GeolocationDispatcher(RenderFrame* render_frame);
   virtual ~GeolocationDispatcher();
 
  private:
-  // RenderFrame::Observer implementation.
-  bool OnMessageReceived(const IPC::Message& message) override;
-
   // WebGeolocationClient
   virtual void startUpdating();
   virtual void stopUpdating();
   virtual void setEnableHighAccuracy(bool enable_high_accuracy);
   virtual void setController(blink::WebGeolocationController* controller);
   virtual bool lastPosition(blink::WebGeolocationPosition& position);
   virtual void requestPermission(
       const blink::WebGeolocationPermissionRequest& permissionRequest);
   virtual void cancelPermissionRequest(
       const blink::WebGeolocationPermissionRequest& permissionRequest);
 
   // GeolocationServiceClient
   void OnLocationUpdate(MojoGeopositionPtr geoposition) override;
 
   // Permission for using geolocation has been set.
-  void OnPermissionSet(int bridge_id, bool is_allowed);
+  void OnPermissionSet(int permission_request_id, PermissionStatus status);
 
   scoped_ptr<blink::WebGeolocationController> controller_;
 
   scoped_ptr<blink::WebGeolocationPermissionRequestManager>
       pending_permissions_;
   GeolocationServicePtr geolocation_service_;
   bool enable_high_accuracy_;
+  PermissionServicePtr permission_service_;
+
+  base::WeakPtrFactory<GeolocationDispatcher> weak_ptr_factory_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_GEOLOCATION_DISPATCHER_H_