Don't setStyle the RenderView every style recalc

Source/web/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 3357 matching lines @@
     m_isTransparent = isTransparent;
 }
 
 bool WebViewImpl::isTransparent() const
 {
     return m_isTransparent;
 }
 
 void WebViewImpl::setBaseBackgroundColor(WebColor color)
 {
+    layout();

[ojan, 2014/03/03 03:30:52]

Why was this change needed?

[abarth-chromium, 2014/03/03 03:50:12]

The call to setBaseBackgroundColor on line 3386 depends on compositing
information.  Previously, the unit test for this function, we just happened to
have clean compositing state.  After the other parts of this change, the unit
test triggers a chicken/egg assert.  Given that this API can be called at any
time, it seems like we need to clean out the compositing state.  An alternative
would be to delay actually setting the background color until the next
compositing update.

+
     if (m_baseBackgroundColor == color)
         return;
 
     m_baseBackgroundColor = color;
 
     if (m_page->mainFrame())
         m_page->mainFrame()->view()->setBaseBackgroundColor(color);
 
     updateLayerTreeBackgroundColor();
 }
@@ skipping 593 matching lines @@
     const PageScaleConstraints& constraints = m_pageScaleConstraintsSet.pageDefinedConstraints();
 
     if (!mainFrameImpl() || !mainFrameImpl()->frameView())
         return false;
 
     return mainFrameImpl()->frameView()->layoutSize().width() == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 } // namespace blink