Add a new resizer corner overlay.

chrome/browser/renderer_host/render_widget_host.cc

Index: chrome/browser/renderer_host/render_widget_host.cc
===================================================================
--- chrome/browser/renderer_host/render_widget_host.cc	(revision 9328)
+++ chrome/browser/renderer_host/render_widget_host.cc	(working copy)
@@ -164,7 +164,8 @@
   if (!new_size.IsEmpty())
     resize_ack_pending_ = true;
 
-  if (!Send(new ViewMsg_Resize(routing_id_, new_size)))
+  if (!Send(new ViewMsg_Resize(routing_id_, new_size,
+                               GetRootWindowResizerRect())))
     resize_ack_pending_ = false;
 }
 
@@ -330,6 +331,10 @@
   BackingStoreManager::RemoveBackingStore(this);
 }
 
+gfx::Rect RenderWidgetHost::GetRootWindowResizerRect() const {
+  return gfx::Rect();
+}
+
 void RenderWidgetHost::Destroy() {
   NotificationService::current()->Notify(
       NotificationType::RENDER_WIDGET_HOST_DESTROYED,