Fix visibilty handling for accelerated Mac plugins

chrome/browser/renderer_host/accelerated_surface_container_mac.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/accelerated_surface_container_mac.h"
 
 #include "app/surface/io_surface_support_mac.h"
 #include "base/logging.h"
 #include "chrome/browser/renderer_host/accelerated_surface_container_manager_mac.h"
 #include "webkit/glue/plugins/webplugin.h"
@@ skipping 49 matching lines @@
     width_ = width;
     height_ = height;
   }
 }
 
 void AcceleratedSurfaceContainerMac::MoveTo(
     const webkit_glue::WebPluginGeometry& geom) {
   x_ = geom.window_rect.x();
   y_ = geom.window_rect.y();
   // TODO(kbr): may need to pay attention to cutout rects.
-  clipRect_ = geom.clip_rect;
+  if (geom.visible)
+    clipRect_ = geom.clip_rect;
+  else
+    clipRect_ = gfx::Rect();
 }
 
 void AcceleratedSurfaceContainerMac::Draw(CGLContextObj context) {
   IOSurfaceSupport* io_surface_support = IOSurfaceSupport::Initialize();
   GLenum target = GL_TEXTURE_RECTANGLE_ARB;
   if (!texture_) {
     if ((io_surface_support && !surface_) ||
         (!io_surface_support && !transport_dib_.get()))
       return;
     glGenTextures(1, &texture_);
@@ skipping 106 matching lines @@
   }
 }
 
 void AcceleratedSurfaceContainerMac::EnqueueTextureForDeletion() {
   if (texture_) {
     manager_->EnqueueTextureForDeletion(texture_);
     texture_ = 0;
   }
 }