Disable GPU compositing and accelerated 2d canvas for about: URLs

content/browser/tab_contents/tab_contents.cc

 // Copyright (c) 2011 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/tab_contents/tab_contents.h"
 
 #include <cmath>
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
@@ skipping 1605 matching lines @@
   is_showing_before_unload_dialog_ = true;
   RunBeforeUnloadDialog(this, UTF16ToWideHack(message), reply_msg);
 }
 
 WebPreferences TabContents::GetWebkitPrefs() {
   Profile* profile = render_view_host()->process()->profile();
   bool is_web_ui = false;
   WebPreferences web_prefs =
       RenderViewHostDelegateHelper::GetWebkitPrefs(profile, is_web_ui);
 
-  // Force accelerated compositing and 2d canvas off for chrome: and
-  // chrome-extension: pages.
+  // Force accelerated compositing and 2d canvas off for chrome:, about: and
+  // chrome-devtools: pages.
   if (GetURL().SchemeIs(chrome::kChromeDevToolsScheme) ||
-      GetURL().SchemeIs(chrome::kChromeUIScheme)) {
+      GetURL().SchemeIs(chrome::kChromeUIScheme) ||
+      GetURL().SchemeIs(chrome::kAboutScheme)) {
     web_prefs.accelerated_compositing_enabled = false;
     web_prefs.accelerated_2d_canvas_enabled = false;
   }
 
 #if defined(OS_MACOSX)
   // Disable accelerated compositing if IOSurface's are not supported,
   // as is the case in 10.5.
   if (!IOSurfaceSupport::Initialize())
       web_prefs.accelerated_compositing_enabled = false;
 #endif
@@ skipping 216 matching lines @@
 
 void TabContents::CreateViewAndSetSizeForRVH(RenderViewHost* rvh) {
   RenderWidgetHostView* rwh_view = view()->CreateViewForWidget(rvh);
   rwh_view->SetSize(view()->GetContainerSize());
 }
 
 void TabContents::OnOnlineStateChanged(bool online) {
   render_view_host()->Send(new ViewMsg_NetworkStateChanged(
       render_view_host()->routing_id(), online));
 }