Dispatch geolocation IPCs on the UI thread. Aside from simplifying the code to avoid a lot of threa…

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
===================================================================
--- content/browser/renderer_host/render_process_host_impl.cc	(revision 269041)
+++ content/browser/renderer_host/render_process_host_impl.cc	(working copy)
@@ -408,7 +408,6 @@
       delayed_cleanup_needed_(false),
       within_process_died_observer_(false),
       power_monitor_broadcaster_(this),
-      geolocation_dispatcher_host_(NULL),
       screen_orientation_dispatcher_host_(NULL),
       worker_ref_count_(0),
       weak_factory_(this) {
@@ -702,9 +701,6 @@
       storage_partition_impl_->GetIndexedDBContext(),
       ChromeBlobStorageContext::GetFor(browser_context)));
 
-  geolocation_dispatcher_host_ = new GeolocationDispatcherHost(
-      GetID(), browser_context->GetGeolocationPermissionContext());
-  AddFilter(geolocation_dispatcher_host_);
   gpu_message_filter_ = new GpuMessageFilter(GetID(), widget_helper_.get());
   AddFilter(gpu_message_filter_);
 #if defined(ENABLE_WEBRTC)
@@ -1449,7 +1445,6 @@
     channel_.reset();
     gpu_message_filter_ = NULL;
     message_port_message_filter_ = NULL;
-    geolocation_dispatcher_host_ = NULL;
     screen_orientation_dispatcher_host_ = NULL;
 
     // Remove ourself from the list of renderer processes so that we can't be
@@ -1837,7 +1832,6 @@
   channel_.reset();
   gpu_message_filter_ = NULL;
   message_port_message_filter_ = NULL;
-  geolocation_dispatcher_host_ = NULL;
   screen_orientation_dispatcher_host_ = NULL;
 
   IDMap<IPC::Listener>::iterator iter(&listeners_);