Implement basic mojo Permission service and use it for Geolocation.

content/browser/renderer_host/render_process_host_impl.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_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_
 
 #include <map>
 #include <queue>
 #include <string>
@@ skipping 30 matching lines @@
 class AudioRendererHost;
 class BrowserCdmManager;
 class BrowserDemuxerAndroid;
 class GpuMessageFilter;
 class MessagePortMessageFilter;
 class MojoApplicationHost;
 class NotificationMessageFilter;
 #if defined(ENABLE_WEBRTC)
 class P2PSocketDispatcherHost;
 #endif
+class PermissionServiceContext;
 class PeerConnectionTrackerHost;
 class RendererMainThread;
 class RenderWidgetHelper;
 class RenderWidgetHost;
 class RenderWidgetHostImpl;
 class RenderWidgetHostViewFrameSubscriber;
 class StoragePartition;
 class StoragePartitionImpl;
 
 typedef base::Thread* (*RendererMainThreadFactoryFunction)(
@@ skipping 397 matching lines @@
   std::vector<int> aec_dump_consumers_;
 
   WebRtcStopRtpDumpCallback stop_rtp_dump_callback_;
 #endif
 
   int worker_ref_count_;
 
   // Records the time when the process starts surviving for workers for UMA.
   base::TimeTicks survive_for_worker_start_time_;
 
+  // Context shared for each PermissionService instance created for this RPH.
+  scoped_ptr<PermissionServiceContext> permission_service_context_;
+
   base::WeakPtrFactory<RenderProcessHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderProcessHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_PROCESS_HOST_IMPL_H_