Uses GeolocationContentSettingsMap on GeolocationPermissionContext to persist settings.

chrome/browser/geolocation/geolocation_permission_context.h

 // Copyright (c) 2010 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_GEOLOCATION_GEOLOCATION_PERMISSION_CONTEXT_H_
 #define CHROME_BROWSER_GEOLOCATION_GEOLOCATION_PERMISSION_CONTEXT_H_
 
 #include <map>
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/ref_counted.h"
 
 class GeolocationDispatcherHost;
 class GURL;
 class GeolocationArbitrator;
 class Profile;
 class RenderViewHost;
 
 // GeolocationPermissionContext manages Geolocation permissions flow,
 // creating UI elements to ask the user for permission when necessary.
 // It always notifies the requesting render_view asynchronously via
 // ViewMsg_Geolocation_PermissionSet.
 class GeolocationPermissionContext
     : public base::RefCountedThreadSafe<GeolocationPermissionContext> {
  public:
   explicit GeolocationPermissionContext(Profile* profile);
 
   // The render is requesting permission to use Geolocation.
   // Response will be sent asynchronously as ViewMsg_Geolocation_PermissionSet.
-  // Must be called from the IO thread.
   void RequestGeolocationPermission(
       int render_process_id, int render_view_id, int bridge_id,
       const GURL& requesting_frame);
 
   // Called once the user sets the geolocation permission.
   // It'll notify the render via ViewMsg_Geolocation_PermissionSet.
   void SetPermission(
       int render_process_id, int render_view_id, int bridge_id,
       const GURL& requesting_frame, bool allowed);
 
@@ skipping 24 matching lines @@
 
   // This should only be accessed from the UI thread.
   Profile* const profile_;
 
   scoped_refptr<GeolocationArbitrator> location_arbitrator_;
 
   DISALLOW_COPY_AND_ASSIGN(GeolocationPermissionContext);
 };
 
 #endif  // CHROME_BROWSER_GEOLOCATION_GEOLOCATION_PERMISSION_CONTEXT_H_