Add a command line switch to control accelerated 2d canvas

webkit/glue/webpreferences.cc

 // Copyright (c) 2009 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 "webkit/glue/webpreferences.h"
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebRuntimeFeatures.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebKit.h"
@@ skipping 78 matching lines @@
   // and support is compiled in.
   settings->setExperimentalWebGLEnabled(experimental_webgl_enabled);
 
   // Display colored borders around composited render layers if requested
   // on command line.
   settings->setShowDebugBorders(show_composited_layer_borders);
 
   // Enable gpu-accelerated compositing if requested on the command line.
   settings->setAcceleratedCompositingEnabled(accelerated_compositing_enabled);
 
+  // Enable gpu-accelerated 2d canvas if requested on the command line.
+  settings->setAccelerated2dCanvasEnabled(accelerated_2d_canvas_enabled);
+
   // Enable memory info reporting to page if requested on the command line.
   settings->setMemoryInfoEnabled(memory_info_enabled);
 
   for (WebInspectorPreferences::const_iterator it = inspector_settings.begin();
        it != inspector_settings.end(); ++it)
     web_view->setInspectorSetting(WebString::fromUTF8(it->first),
                                   WebString::fromUTF8(it->second));
 
   // Tabs to link is not part of the settings. WebCore calls
   // ChromeClient::tabsToLinks which is part of the glue code.
   web_view->setTabsToLinks(tabs_to_links);
 }