[Experimental] CSSSerializer Proof-of-concept

third_party/WebKit/Source/core/style/ComputedStyle.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 816 matching lines @@
     if (add) {
         appendContent(ContentData::create(image));
         return;
     }
 
     rareNonInheritedData.access()->m_content = ContentData::create(image);
 }
 
 void ComputedStyle::setContent(const String& string, bool add)
 {
+    ASSERT(!string.isNull());
     OwnPtrWillBePersistent<ContentData>& content = rareNonInheritedData.access()->m_content;
     if (add) {
         ContentData* lastContent = content.get();
         while (lastContent && lastContent->next())
             lastContent = lastContent->next();
 
         if (lastContent) {
             // We attempt to merge with the last ContentData if possible.
             if (lastContent->isText()) {
                 TextContentData* textContent = toTextContentData(lastContent);
@@ skipping 982 matching lines @@
 }
 
 void ComputedStyle::copyChildDependentFlagsFrom(const ComputedStyle& other)
 {
     setEmptyState(other.emptyState());
     if (other.hasExplicitlyInheritedProperties())
         setHasExplicitlyInheritedProperties();
 }
 
 } // namespace blink