Support for CSSOM CSSNamespaceRule interface

Source/core/css/StyleRule.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2005, 2006, 2008, 2012 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/css/StyleRule.h"
 
 #include "core/css/CSSFontFaceRule.h"
 #include "core/css/CSSImportRule.h"
 #include "core/css/CSSKeyframesRule.h"
 #include "core/css/CSSMediaRule.h"
+#include "core/css/CSSNamespaceRule.h"
 #include "core/css/CSSPageRule.h"
 #include "core/css/CSSStyleRule.h"
 #include "core/css/CSSSupportsRule.h"
 #include "core/css/CSSViewportRule.h"
 #include "core/css/StyleRuleImport.h"
 #include "core/css/StyleRuleKeyframe.h"
 #include "core/css/StyleRuleNamespace.h"
 
 namespace blink {
 
@@ skipping 183 matching lines @@
         break;
     case Supports:
         rule = CSSSupportsRule::create(toStyleRuleSupports(self), parentSheet);
         break;
     case Import:
         rule = CSSImportRule::create(toStyleRuleImport(self), parentSheet);
         break;
     case Keyframes:
         rule = CSSKeyframesRule::create(toStyleRuleKeyframes(self), parentSheet);
         break;
+    case Namespace:
+        rule = CSSNamespaceRule::create(toStyleRuleNamespace(self), parentSheet);
+        break;
     case Viewport:
         rule = CSSViewportRule::create(toStyleRuleViewport(self), parentSheet);
         break;
     case Keyframe:
-    case Namespace:
     case Charset:
         ASSERT_NOT_REACHED();
         return nullptr;
     }
     if (parentRule)
         rule->setParentRule(parentRule);
     return rule.release();
 }
 
 unsigned StyleRule::averageSizeInBytes()
@@ skipping 178 matching lines @@
     return *toMutableStylePropertySet(m_properties);
 }
 
 DEFINE_TRACE_AFTER_DISPATCH(StyleRuleViewport)
 {
     visitor->trace(m_properties);
     StyleRuleBase::traceAfterDispatch(visitor);
 }
 
 } // namespace blink