Set disabled style on GPU window and plugin intermediate window so mouse mess...

chrome/plugin/webplugin_proxy.h

Index: chrome/plugin/webplugin_proxy.h
===================================================================
--- chrome/plugin/webplugin_proxy.h	(revision 36167)
+++ chrome/plugin/webplugin_proxy.h	(working copy)
@@ -42,6 +42,12 @@
 
   // WebPlugin overrides
   void SetWindow(gfx::PluginWindowHandle window);
+
+  // Whether input events should be sent to the delegate.
+  virtual void SetAcceptsInputEvents(bool accepts) {
+    NOTREACHED();
+  }
+
   void WillDestroyWindow(gfx::PluginWindowHandle window);
 #if defined(OS_WIN)
   void SetWindowlessPumpEvent(HANDLE pump_messages_event);