Add a mechanism to pause and resume geolocation requests.

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 "content/public/browser/browser_message_filter.h"
 
 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(
       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;
+
  protected:
   GeolocationDispatcherHost();
   virtual ~GeolocationDispatcherHost();
 
   DISALLOW_COPY_AND_ASSIGN(GeolocationDispatcherHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GEOLOCATION_GEOLOCATION_DISPATCHER_HOST_H_