Add a mechanism to pause and resume geolocation requests.

content/browser/geolocation/geolocation_dispatcher_host.h

Index: content/browser/geolocation/geolocation_dispatcher_host.h
diff --git a/content/browser/geolocation/geolocation_dispatcher_host.h b/content/browser/geolocation/geolocation_dispatcher_host.h
index 0631c8718f228f9fdf691218bbff6cbd9e39d999..bfc38b478fdf06154e81b23666ee5da03bc57c94 100644
--- a/content/browser/geolocation/geolocation_dispatcher_host.h
+++ b/content/browser/geolocation/geolocation_dispatcher_host.h
@@ -19,6 +19,17 @@ class GeolocationDispatcherHost : public BrowserMessageFilter {
       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;
+
+  // Returns true if there are any non-paused geolocation callbacks
+  // currently registered. Should only be called on the IO thread.
+  virtual bool IsGeolocationActive() = 0;
+
  protected:
   GeolocationDispatcherHost();
   virtual ~GeolocationDispatcherHost();