Move create() methods from StylePropertySet to MutableStylePropertySet.

Source/core/css/StylePropertySet.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Research In Motion Limited. 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.
  *
@@ skipping 492 matching lines @@
 
 PassRefPtr<MutableStylePropertySet> StylePropertySet::copyPropertiesInSet(const Vector<CSSPropertyID>& properties) const
 {
     Vector<CSSProperty, 256> list;
     list.reserveInitialCapacity(properties.size());
     for (unsigned i = 0; i < properties.size(); ++i) {
         RefPtr<CSSValue> value = getPropertyCSSValue(properties[i]);
         if (value)
             list.append(CSSProperty(properties[i], value.release(), false));
     }
-    return static_pointer_cast<MutableStylePropertySet>(StylePropertySet::create(list.data(), list.size()));
+    return MutableStylePropertySet::create(list.data(), list.size());
 }
 
 PropertySetCSSStyleDeclaration* StylePropertySet::cssStyleDeclaration()
 {
     if (!m_ownsCSSOMWrapper)
         return 0;
     ASSERT(isMutable());
     return propertySetCSSOMWrapperMap().get(this);
 }
 
@@ skipping 50 matching lines @@
 };
 COMPILE_ASSERT(sizeof(StylePropertySet) == sizeof(SameSizeAsStylePropertySet), style_property_set_should_stay_small);
 
 #ifndef NDEBUG
 void StylePropertySet::showStyle()
 {
     fprintf(stderr, "%s\n", asText().ascii().data());
 }
 #endif
 
-PassRefPtr<StylePropertySet> StylePropertySet::create(CSSParserMode cssParserMode)
+PassRefPtr<MutableStylePropertySet> MutableStylePropertySet::create(CSSParserMode cssParserMode)
 {
     return adoptRef(new MutableStylePropertySet(cssParserMode));
 }
 
-PassRefPtr<StylePropertySet> StylePropertySet::create(const CSSProperty* properties, unsigned count)
+PassRefPtr<MutableStylePropertySet> MutableStylePropertySet::create(const CSSProperty* properties, unsigned count)
 {
     return adoptRef(new MutableStylePropertySet(properties, count));
 }
 
 String StylePropertySet::PropertyReference::cssName() const
 {
     if (id() == CSSPropertyVariable) {
         ASSERT(propertyValue()->isVariableValue());
         if (!propertyValue()->isVariableValue())
             return emptyString(); // Should not happen, but if it does, avoid a bad cast.
         return "-webkit-var-" + static_cast<const CSSVariableValue*>(propertyValue())->name();
     }
     return getPropertyNameString(id());
 }
 
 String StylePropertySet::PropertyReference::cssText() const
 {
     StringBuilder result;
     result.append(cssName());
     result.appendLiteral(": ");
     result.append(propertyValue()->cssText());
     if (isImportant())
         result.appendLiteral(" !important");
     result.append(';');
     return result.toString();
 }
 
 
 } // namespace WebCore