Support for CSSOM CSSNamespaceRule interface

Source/core/css/CSSRule.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2007, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Andreas Kling (kling@webkit.org)
  *
  * 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 33 matching lines @@
         STYLE_RULE = 1,
         CHARSET_RULE = 2,
         IMPORT_RULE = 3,
         MEDIA_RULE = 4,
         FONT_FACE_RULE = 5,
         PAGE_RULE = 6,
         KEYFRAMES_RULE = 7,
         WEBKIT_KEYFRAMES_RULE = KEYFRAMES_RULE,
         KEYFRAME_RULE = 8,
         WEBKIT_KEYFRAME_RULE = KEYFRAME_RULE,
+        NAMESPACE_RULE = 10,
         SUPPORTS_RULE = 12,
         VIEWPORT_RULE = 15,
     };
 
     virtual Type type() const = 0;
     virtual String cssText() const = 0;
     virtual void reattach(StyleRuleBase*) = 0;
 
     virtual CSSRuleList* cssRules() const { return 0; }
 
@@ skipping 46 matching lines @@
         CSSStyleSheet* m_parentStyleSheet;
     };
 };
 
 #define DEFINE_CSS_RULE_TYPE_CASTS(ToType, TYPE_NAME) \
     DEFINE_TYPE_CASTS(ToType, CSSRule, rule, rule->type() == CSSRule::TYPE_NAME, rule.type() == CSSRule::TYPE_NAME)
 
 } // namespace blink
 
 #endif // CSSRule_h