Refactor RenderProcessHost to use IPC::Listener instead of RenderWidgetHost

content/browser/gpu/gpu_process_host_ui_shim.cc

Index: content/browser/gpu/gpu_process_host_ui_shim.cc
diff --git a/content/browser/gpu/gpu_process_host_ui_shim.cc b/content/browser/gpu/gpu_process_host_ui_shim.cc
index 6d822b4a95f357543d83ca00eb466be5f6f2a04e..8732e30a2f8bb19d18f885a77c447c824301a2fd 100644
--- a/content/browser/gpu/gpu_process_host_ui_shim.cc
+++ b/content/browser/gpu/gpu_process_host_ui_shim.cc
@@ -90,11 +90,8 @@ RenderWidgetHostViewPort* GetRenderWidgetHostViewFromSurfaceID(
         surface_id, &render_process_id, &render_widget_id))
     return NULL;
 
-  RenderProcessHost* process = RenderProcessHost::FromID(render_process_id);
-  if (!process)
-    return NULL;
-
-  RenderWidgetHost* host = process->GetRenderWidgetHostByID(render_widget_id);
+  RenderWidgetHost* host =
+      RenderWidgetHost::FromID(render_process_id, render_widget_id);
   return host ? RenderWidgetHostViewPort::FromRWHV(host->GetView()) : NULL;
 }
 
@@ -231,10 +228,8 @@ void GpuProcessHostUIShim::OnUpdateVSyncParameters(int surface_id,
       surface_id, &render_process_id, &render_widget_id)) {
     return;
   }
-  RenderProcessHost* host = RenderProcessHost::FromID(render_process_id);
-  if (!host)
-    return;
-  RenderWidgetHost* rwh = host->GetRenderWidgetHostByID(render_widget_id);
+  RenderWidgetHost* rwh =
+      RenderWidgetHost::FromID(render_process_id, render_widget_id);
   if (!rwh)
     return;
   RenderWidgetHostImpl::From(rwh)->UpdateVSyncParameters(timebase, interval);