Add flag to disable impl-side painting

webkit/compositor_bindings/web_image_layer_impl.cc

 // Copyright 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 "webkit/compositor_bindings/web_image_layer_impl.h"
 
 #include "base/command_line.h"
 #include "cc/image_layer.h"
 #include "cc/picture_image_layer.h"
 #include "cc/switches.h"
 #include "webkit/compositor_bindings/web_layer_impl.h"
 
 static bool usingPictureLayer()
 {
-    return CommandLine::ForCurrentProcess()->HasSwitch(cc::switches::kEnableImplSidePainting);
+    return cc::switches::IsImplSidePaintingEnabled();
 }
 
 namespace WebKit {
 
 WebImageLayerImpl::WebImageLayerImpl()
 {
     if (usingPictureLayer())
         m_layer.reset(new WebLayerImpl(cc::PictureImageLayer::create()));
     else
         m_layer.reset(new WebLayerImpl(cc::ImageLayer::create()));
@@ skipping 10 matching lines @@
 
 void WebImageLayerImpl::setBitmap(SkBitmap bitmap)
 {
     if (usingPictureLayer())
         static_cast<cc::PictureImageLayer*>(m_layer->layer())->setBitmap(bitmap);
     else
         static_cast<cc::ImageLayer*>(m_layer->layer())->setBitmap(bitmap);
 }
 
 } // namespace WebKit