Switch CSSStyleDeclaration's property setter to new-style ExceptionState.

Source/core/css/PropertySetCSSStyleDeclaration.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 241 matching lines @@
 PassRefPtr<CSSValue> PropertySetCSSStyleDeclaration::getPropertyCSSValueInternal(CSSPropertyID propertyID)
 {
     return m_propertySet->getPropertyCSSValue(propertyID);
 }
 
 String PropertySetCSSStyleDeclaration::getPropertyValueInternal(CSSPropertyID propertyID)
 {
     return m_propertySet->getPropertyValue(propertyID);
 }
 
-void PropertySetCSSStyleDeclaration::setPropertyInternal(CSSPropertyID propertyID, const String& value, bool important, ExceptionState& exceptionState)
+void PropertySetCSSStyleDeclaration::setPropertyInternal(CSSPropertyID propertyID, const String& value, bool important, ExceptionState&)
 {
     StyleAttributeMutationScope mutationScope(this);
     willMutate();
 
     bool changed = m_propertySet->setProperty(propertyID, value, important, contextStyleSheet());
 
     didMutate(changed ? PropertyChanged : NoChanges);
 
     if (changed)
         mutationScope.enqueueMutationRecord();
@@ skipping 152 matching lines @@
     m_parentElement->invalidateStyleAttribute();
     StyleAttributeMutationScope(this).didInvalidateStyleAttr();
 }
 
 CSSStyleSheet* InlineCSSStyleDeclaration::parentStyleSheet() const
 {
     return m_parentElement ? m_parentElement->document().elementSheet() : 0;
 }
 
 } // namespace WebCore