Reduce CSSProperty's StylePropertyMetadata memory footprint by half when used inside a ImmutableSty…

Source/core/css/StylePropertyShorthand.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008 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.
  *
  * 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.
  */
 
 #ifndef StylePropertyShorthand_h
 #define StylePropertyShorthand_h
 
 #include "CSSPropertyNames.h"
+#include "wtf/Vector.h"
 
 namespace WebCore {
 
 class StylePropertyShorthand {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     StylePropertyShorthand()
         : m_properties(0)
         , m_propertiesForInitialization(0)
         , m_length(0)
+        , m_shorthandID(CSSPropertyInvalid)
     {
     }
 
-    StylePropertyShorthand(const CSSPropertyID* properties, unsigned numProperties)
+    StylePropertyShorthand(CSSPropertyID id, const CSSPropertyID* properties, unsigned numProperties)
         : m_properties(properties)
         , m_propertiesForInitialization(0)
         , m_length(numProperties)
+        , m_shorthandID(id)
     {
     }
 
-    StylePropertyShorthand(const CSSPropertyID* properties, const StylePropertyShorthand** propertiesForInitialization, unsigned numProperties)
+    StylePropertyShorthand(CSSPropertyID id, const CSSPropertyID* properties, const StylePropertyShorthand** propertiesForInitialization, unsigned numProperties)
         : m_properties(properties)
         , m_propertiesForInitialization(propertiesForInitialization)
         , m_length(numProperties)
+        , m_shorthandID(id)
     {
     }
 
     const CSSPropertyID* properties() const { return m_properties; }
     const StylePropertyShorthand** propertiesForInitialization() const { return m_propertiesForInitialization; }
     unsigned length() const { return m_length; }
+    CSSPropertyID id() const { return m_shorthandID; }
 
 private:
     const CSSPropertyID* m_properties;
     const StylePropertyShorthand** m_propertiesForInitialization;
     unsigned m_length;
+    CSSPropertyID m_shorthandID;
 };
 
 const StylePropertyShorthand& backgroundShorthand();
 const StylePropertyShorthand& backgroundPositionShorthand();
 const StylePropertyShorthand& backgroundRepeatShorthand();
 const StylePropertyShorthand& borderShorthand();
 const StylePropertyShorthand& borderAbridgedShorthand();
 const StylePropertyShorthand& borderBottomShorthand();
 const StylePropertyShorthand& borderColorShorthand();
 const StylePropertyShorthand& borderImageShorthand();
@@ skipping 27 matching lines @@
 const StylePropertyShorthand& webkitMarginCollapseShorthand();
 const StylePropertyShorthand& webkitMarqueeShorthand();
 const StylePropertyShorthand& webkitMaskShorthand();
 const StylePropertyShorthand& webkitMaskPositionShorthand();
 const StylePropertyShorthand& webkitMaskRepeatShorthand();
 const StylePropertyShorthand& webkitTextEmphasisShorthand();
 const StylePropertyShorthand& webkitTextStrokeShorthand();
 const StylePropertyShorthand& webkitTransitionShorthand();
 const StylePropertyShorthand& webkitTransformOriginShorthand();
 
-// Returns an empty list if the property is not a shorthand
+// Returns an empty list if the property is not a shorthand.
 const StylePropertyShorthand& shorthandForProperty(CSSPropertyID);
 
+// Return the list of shorthands for a given longhand.
+const Vector<StylePropertyShorthand> matchingShorthandsForLonghand(CSSPropertyID);
+unsigned indexOfShorthandForLonghand(CSSPropertyID, const Vector<StylePropertyShorthand>&);
+
 bool isExpandedShorthand(CSSPropertyID);
 
 } // namespace WebCore
 
 #endif // StylePropertyShorthand_h