Merge GeolocationDispatcherHostImpl with GeolocationDispatcher. None of the other message filters h…

content/browser/geolocation/geolocation_dispatcher_host.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_GEOLOCATION_GEOLOCATION_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_DISPATCHER_HOST_H_
 
+#include <map>
+#include <set>
+
+#include "content/browser/geolocation/geolocation_provider_impl.h"
 #include "content/public/browser/browser_message_filter.h"
 
+class GURL;
+
 namespace content {
 
 class GeolocationPermissionContext;
 
 // GeolocationDispatcherHost is a browser filter for Geolocation messages.
 // It's the complement of GeolocationDispatcher (owned by RenderView).
 class GeolocationDispatcherHost : public BrowserMessageFilter {
  public:
-  static GeolocationDispatcherHost* New(
+  GeolocationDispatcherHost(
       int render_process_id,
       GeolocationPermissionContext* geolocation_permission_context);
 
   // Pause or resumes geolocation for the given |render_view_id|. Should
   // be called on the IO thread. Resuming when nothing is paused is a no-op.
   // If a renderer is paused while not currently using geolocation but
   // then goes on to do so before being resumed, then that renderer will
   // not get geolocation updates until it is resumed.
-  virtual void PauseOrResume(int render_view_id, bool should_pause) = 0;
+  void PauseOrResume(int render_view_id, bool should_pause);
 
- protected:
-  GeolocationDispatcherHost();
+ private:
   virtual ~GeolocationDispatcherHost();
 
+  // GeolocationDispatcherHost
+  virtual bool OnMessageReceived(const IPC::Message& msg,
+                                 bool* msg_was_ok) OVERRIDE;
+
+  // Message handlers:
+  void OnRequestPermission(int render_view_id,
+                           int bridge_id,
+                           const GURL& requesting_frame,
+                           bool user_gesture);
+  void OnCancelPermissionRequest(int render_view_id,
+                                 int bridge_id,
+                                 const GURL& requesting_frame);
+  void OnStartUpdating(int render_view_id,
+                       const GURL& requesting_frame,
+                       bool enable_high_accuracy);
+  void OnStopUpdating(int render_view_id);
+
+  // Updates the |geolocation_provider_| with the currently required update
+  // options.
+  void RefreshGeolocationOptions();
+
+  void OnLocationUpdate(const Geoposition& position);
+
+  int render_process_id_;
+  scoped_refptr<GeolocationPermissionContext> geolocation_permission_context_;
+
+  struct RendererGeolocationOptions {
+    bool high_accuracy;
+    bool is_paused;
+  };
+
+  // Used to keep track of the renderers in this process that are using
+  // geolocation and the options associated with them. The map is iterated
+  // when a location update is available and the fan out to individual bridge
+  // IDs happens renderer side, in order to minimize context switches.
+  // Only used on the IO thread.
+  std::map<int, RendererGeolocationOptions> geolocation_renderers_;
+
+  // Used by Android WebView to support that case that a renderer is in the
+  // 'paused' state but not yet using geolocation. If the renderer does start
+  // using geolocation while paused, we move from this set into
+  // |geolocation_renderers_|. If the renderer doesn't end up wanting to use
+  // geolocation while 'paused' then we remove from this set. A renderer id
+  // can exist only in this set or |geolocation_renderers_|, never both.
+  std::set<int> pending_paused_geolocation_renderers_;
+
+  // Only set whilst we are registered with the geolocation provider.
+  GeolocationProviderImpl* geolocation_provider_;
+
+  GeolocationProviderImpl::LocationUpdateCallback callback_;
+
   DISALLOW_COPY_AND_ASSIGN(GeolocationDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_DISPATCHER_HOST_H_