Add flag to disable impl-side painting

content/renderer/gpu/render_widget_compositor.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/gpu/render_widget_compositor.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/time.h"
@@ skipping 77 matching lines @@
   settings.perTilePaintingEnabled = web_settings.perTilePaintingEnabled;
   settings.acceleratedAnimationEnabled =
       web_settings.acceleratedAnimationEnabled;
   settings.pageScalePinchZoomEnabled = web_settings.pageScalePinchZoomEnabled;
   settings.refreshRate = web_settings.refreshRate;
   settings.defaultTileSize = web_settings.defaultTileSize;
   settings.maxUntiledLayerSize = web_settings.maxUntiledLayerSize;
 
   settings.rightAlignedSchedulingEnabled =
       cmd->HasSwitch(cc::switches::kEnableRightAlignedScheduling);
-  settings.implSidePainting =
-      cmd->HasSwitch(cc::switches::kEnableImplSidePainting);
+  settings.implSidePainting = cc::switches::IsImplSidePaintingEnabled();
   settings.useCheapnessEstimator =
       cmd->HasSwitch(cc::switches::kUseCheapnessEstimator);
 
   settings.calculateTopControlsPosition =
       cmd->HasSwitch(cc::switches::kEnableTopControlsPositionCalculation);
   if (cmd->HasSwitch(cc::switches::kTopControlsHeight)) {
     std::string controls_height_str =
         cmd->GetSwitchValueASCII(cc::switches::kTopControlsHeight);
     double controls_height;
     if (base::StringToDouble(controls_height_str, &controls_height) &&
@@ skipping 306 matching lines @@
   widget_->didCompleteSwapBuffers();
 }
 
 // TODO(jamesr): This goes through WebViewImpl just to do suppression, refactor
 // that piece out.
 void RenderWidgetCompositor::scheduleComposite() {
   client_->scheduleComposite();
 }
 
 }  // namespace content