Turn StyleSharing to 11.

sky/engine/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 972 matching lines @@
         bool rendererWillChange = needsAttach() || renderer();
         reattach(reattachContext);
         if (rendererWillChange || renderer())
             return Reattach;
         return ReattachNoRenderer;
     }
 
     ASSERT(oldStyle);
 
     if (RenderObject* renderer = this->renderer()) {
-        if (localChange != NoChange) {
+        if (localChange != NoChange)
             renderer->setStyle(newStyle.get());
-        } else {
-            // Although no change occurred, we use the new style so that the cousin style sharing code won't get
-            // fooled into believing this style is the same.
-            // FIXME: We may be able to remove this hack, see discussion in
-            // https://codereview.chromium.org/30453002/
-            renderer->setStyleInternal(newStyle.get());
-        }
     }
 
     if (styleChangeType() >= SubtreeStyleChange)
         return Force;
 
     if (change > Inherit || localChange > Inherit)
         return max(localChange, change);
 
     return localChange;
 }
@@ skipping 818 matching lines @@
         return false;
     // Turn off style sharing for elements that can gain layers for reasons outside of the style system.
     // See comments in RenderObject::setStyle().
     // FIXME: Why does gaining a layer from outside the style system require disabling sharing?
     if (isHTMLCanvasElement(*this))
         return false;
     return true;
 }
 
 } // namespace blink