Stylesheet rule.cssText of content property should be quoted when the value is string.

Source/core/css/CSSValue.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 13 matching lines @@
 #include "core/dom/ExceptionCode.h"
 #include "weborigin/KURL.h"
 #include "wtf/ListHashSet.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 class StyleSheetContents;
 
+enum CssTextFormattingFlags { QuoteCSSStringIfNeeded, AlwaysQuoteCSSString };
+
 // FIXME: The current CSSValue and subclasses should be turned into internal types (StyleValue).
 // The few subtypes that are actually exposed in CSSOM can be seen in the cloneForCSSOM() function.
 // They should be handled by separate wrapper classes.
 
 // Please don't expose more CSSValue types to the web.
 class CSSValue : public RefCounted<CSSValue> {
 public:
     enum Type {
         CSS_INHERIT = 0,
         CSS_PRIMITIVE_VALUE = 1,
@@ skipping 186 matching lines @@
 
 template<typename CSSValueType>
 inline bool compareCSSValuePtr(const RefPtr<CSSValueType>& first, const RefPtr<CSSValueType>& second)
 {
     return first ? second && first->equals(*second) : !second;
 }
 
 } // namespace WebCore
 
 #endif // CSSValue_h