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

Source/core/css/StylePropertySet.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
+ * 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 143 matching lines @@
     const StylePropertyMetadata* metadataArray() const;
 
     void* m_storage;
 
 private:
     ImmutableStylePropertySet(const CSSProperty*, unsigned count, CSSParserMode);
 };
 
 inline const CSSValue** ImmutableStylePropertySet::valueArray() const
 {
-    return reinterpret_cast<const CSSValue**>(const_cast<const void**>((&static_cast<const ImmutableStylePropertySet*>(this)->m_storage)));
+    return reinterpret_cast<const CSSValue**>(const_cast<const void**>(&(this->m_storage)));
 }
 
 inline const StylePropertyMetadata* ImmutableStylePropertySet::metadataArray() const
 {
-    return reinterpret_cast<const StylePropertyMetadata*>(&reinterpret_cast<const char*>((&static_cast<const ImmutableStylePropertySet*>(this)->m_storage))[m_arraySize * sizeof(CSSValue*)]);
+    return reinterpret_cast<const StylePropertyMetadata*>(&reinterpret_cast<const char*>(&(this->m_storage))[m_arraySize * sizeof(CSSValue*)]);
 }
 
 class MutableStylePropertySet : public StylePropertySet {
 public:
     ~MutableStylePropertySet();
 
     static PassRefPtr<MutableStylePropertySet> create(CSSParserMode = CSSQuirksMode);
     static PassRefPtr<MutableStylePropertySet> create(const CSSProperty* properties, unsigned count);
 
     MutableStylePropertySet(const StylePropertySet&);
@@ skipping 76 matching lines @@
 
     if (m_isMutable)
         delete static_cast<MutableStylePropertySet*>(this);
     else
         delete static_cast<ImmutableStylePropertySet*>(this);
 }
 
 } // namespace WebCore
 
 #endif // StylePropertySet_h