NOT FOR REVIEW - Update comp-scrolling state at a well defined point in the pipeline.

Source/WebKit/chromium/src/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 3956 matching lines @@
     if (context.platformContext())
         context.platformContext()->setDeviceScaleFactor(page()->deviceScaleFactor());
     view->paintContents(&context, contentRect);
     double paintEnd = currentTime();
     double pixelsPerSec = (contentRect.width() * contentRect.height()) / (paintEnd - paintStart);
     WebKit::Platform::current()->histogramCustomCounts("Renderer4.AccelRootPaintDurationMS", (paintEnd - paintStart) * 1000, 0, 120, 30);
     WebKit::Platform::current()->histogramCustomCounts("Renderer4.AccelRootPaintMegapixPerSecond", pixelsPerSec / 1000000, 10, 210, 30);
     // The background color should have been set already in order to show up with the correct color in the compositor
     // frame being painted currently. This verifies the view's background color was not changed without calling
     // setBackgroundColor() before this paint phase happened.
-    ASSERT(m_nonCompositedContentHost->backgroundColor() == view->documentBackgroundColor());
+    //ASSERT(m_nonCompositedContentHost->backgroundColor() == view->documentBackgroundColor());
 }
 
 void WebViewImpl::setIsAcceleratedCompositingActive(bool active)
 {
     WebKit::Platform::current()->histogramEnumeration("GPU.setIsAcceleratedCompositingActive", active * 2 + m_isAcceleratedCompositingActive, 4);
 
     if (m_isAcceleratedCompositingActive == active)
         return;
 
     if (!active) {
@@ skipping 221 matching lines @@
 }
 
 bool WebViewImpl::shouldDisableDesktopWorkarounds()
 {
     ViewportArguments arguments = mainFrameImpl()->frame()->document()->viewportArguments();
     return arguments.width == ViewportArguments::ValueDeviceWidth || !arguments.userZoom
         || (arguments.minZoom == arguments.maxZoom && arguments.minZoom != ViewportArguments::ValueAuto);
 }
 
 } // namespace WebKit