Browser Plugin: Disable Accelerated Compositing

content/browser/web_contents/web_contents_impl.cc

 // Copyright (c) 2012 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/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
@@ skipping 670 matching lines @@
 
   prefs.number_of_cpu_cores = base::SysInfo::NumberOfProcessors();
 
   prefs.apply_page_scale_factor_in_compositor =
       command_line.HasSwitch(switches::kEnablePinchInCompositor);
 
   content::GetContentClient()->browser()->OverrideWebkitPrefs(rvh, url, &prefs);
 
   // Disable compositing in guests until we have compositing path implemented
   // for guests.
-  if (rvh->GetProcess()->IsGuest())
+  if (rvh->GetProcess()->IsGuest()) {
     prefs.force_compositing_mode = false;
+    prefs.accelerated_compositing_enabled = false;
+  }
 
   return prefs;
 }
 
 RenderViewHostManager* WebContentsImpl::GetRenderManagerForTesting() {
   return &render_manager_;
 }
 
 bool WebContentsImpl::OnMessageReceived(RenderViewHost* render_view_host,
                                         const IPC::Message& message) {
@@ skipping 2701 matching lines @@
   }
 }
 
 content::BrowserPluginGuest* WebContentsImpl::GetBrowserPluginGuest() {
   return browser_plugin_guest_.get();
 }
 
 content::BrowserPluginEmbedder* WebContentsImpl::GetBrowserPluginEmbedder() {
   return browser_plugin_embedder_.get();
 }