Rename/tweak some StylePropertySet/CSSStyleDeclaration copying functions.

Source/core/dom/StyledElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008, 2010 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
@@ skipping 134 matching lines @@
 {
     return ensureMutableInlineStyle()->ensureInlineCSSStyleDeclaration(this);
 }
 
 MutableStylePropertySet* StyledElement::ensureMutableInlineStyle()
 {
     RefPtr<StylePropertySet>& inlineStyle = ensureUniqueElementData()->m_inlineStyle;
     if (!inlineStyle)
         inlineStyle = StylePropertySet::create(strictToCSSParserMode(isHTMLElement() && !document()->inQuirksMode()));
     else if (!inlineStyle->isMutable())
-        inlineStyle = inlineStyle->copy();
+        inlineStyle = inlineStyle->mutableCopy();
     ASSERT(inlineStyle->isMutable());
     return static_cast<MutableStylePropertySet*>(inlineStyle.get());
 }
 
 void StyledElement::attributeChanged(const QualifiedName& name, const AtomicString& newValue, AttributeModificationReason reason)
 {
     if (name == styleAttr)
         styleAttributeChanged(newValue, reason);
     else if (isPresentationAttribute(name)) {
         elementData()->m_presentationAttributeStyleIsDirty = true;
@@ skipping 206 matching lines @@
 {
     style->setProperty(propertyID, cssValuePool().createValue(value, unit));
 }
     
 void StyledElement::addPropertyToPresentationAttributeStyle(MutableStylePropertySet* style, CSSPropertyID propertyID, const String& value)
 {
     style->setProperty(propertyID, value, false, document()->elementSheet()->contents());
 }
 
 }