Make sure ImmutableStylePropertySet uses the new 16 bits size of StylePropertyMetadata.

Source/core/css/CSSProperty.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
+ * Copyright (C) 2013 Intel Corporation. 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.
@@ skipping 22 matching lines @@
         , m_isSetFromShorthand(isSetFromShorthand)
         , m_indexInShorthandsVector(indexInShorthandsVector)
         , m_important(important)
         , m_implicit(implicit)
         , m_inherited(inherited)
     {
     }
 
     CSSPropertyID shorthandID() const;
 
-    unsigned m_propertyID : 10;
-    unsigned m_isSetFromShorthand : 1;
-    unsigned m_indexInShorthandsVector : 2; // If this property was set as part of an ambiguous shorthand, gives the index in the shorthands vector.
-    unsigned m_important : 1;
-    unsigned m_implicit : 1; // Whether or not the property was set implicitly as the result of a shorthand.
-    unsigned m_inherited : 1;
+    uint16_t m_propertyID : 10;
+    uint16_t m_isSetFromShorthand : 1;
+    uint16_t m_indexInShorthandsVector : 2; // If this property was set as part of an ambiguous shorthand, gives the index in the shorthands vector.
+    uint16_t m_important : 1;
+    uint16_t m_implicit : 1; // Whether or not the property was set implicitly as the result of a shorthand.
+    uint16_t m_inherited : 1;
 };
 
 class CSSProperty {
 public:
     CSSProperty(CSSPropertyID propertyID, PassRefPtr<CSSValue> value, bool important = false, bool isSetFromShorthand = false, int indexInShorthandsVector = 0, bool implicit = false)
         : m_metadata(propertyID, isSetFromShorthand, indexInShorthandsVector, important, implicit, isInheritedProperty(propertyID))
         , m_value(value)
     {
     ASSERT((propertyID == CSSPropertyVariable) == (m_value && m_value->isVariableValue()));
     }
@@ skipping 72 matching lines @@
 } // namespace WebCore
 
 namespace WTF {
 template <> struct VectorTraits<WebCore::CSSProperty> : VectorTraitsBase<false, WebCore::CSSProperty> {
     static const bool canInitializeWithMemset = true;
     static const bool canMoveWithMemcpy = true;
 };
 }
 
 #endif // CSSProperty_h