Disable partial swaps for webview guest renderer until we can figure out how to do that properly.

content/renderer/browser_plugin/browser_plugin_compositing_helper.cc

 // Copyright (c) 2013 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 "content/renderer/browser_plugin/browser_plugin_compositing_helper.h"
 
 #include "cc/context_provider.h"
 #include "cc/solid_color_layer.h"
 #include "cc/texture_layer.h"
 #include "content/common/browser_plugin/browser_plugin_messages.h"
@@ skipping 200 matching lines @@
   cc::TextureMailbox::ReleaseCallback callback;
   if (current_mailbox_valid) {
     callback = base::Bind(&BrowserPluginCompositingHelper::MailboxReleased,
                           scoped_refptr<BrowserPluginCompositingHelper>(this),
                           mailbox_name,
                           gpu_route_id,
                           gpu_host_id);
   }
   texture_layer_->setTextureMailbox(cc::TextureMailbox(mailbox_name,
                                                        callback));
+  texture_layer_->setNeedsDisplay();
   last_mailbox_valid_ = current_mailbox_valid;
 }
 
 void BrowserPluginCompositingHelper::UpdateVisibility(bool visible) {
   if (texture_layer_)
     texture_layer_->setIsDrawable(visible);
 }
 
 }  // namespace content