Fix flickering when resizing pepper plugins.

webkit/glue/plugins/pepper_plugin_instance.cc

Index: webkit/glue/plugins/pepper_plugin_instance.cc
===================================================================
--- webkit/glue/plugins/pepper_plugin_instance.cc	(revision 66086)
+++ webkit/glue/plugins/pepper_plugin_instance.cc	(working copy)
@@ -437,7 +437,6 @@
   if (graphics_2d) {
     if (!graphics_2d->BindToInstance(this))
       return false;  // Can't bind to more than one instance.
-    bound_graphics_ = graphics_2d;
 
     // See http://crbug.com/49403: this can be further optimized by keeping the
     // old device around and painting from it.
@@ -459,6 +458,7 @@
     }
 
     // BindToInstance will have invalidated the plugin if necessary.
+    bound_graphics_ = graphics_2d;
   } else if (graphics_3d) {
     if (!graphics_3d->BindToInstance(this))
       return false;