Enable MQ evaluation off the main thread

Source/core/css/CSSParser-in.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
@@ skipping 10699 matching lines @@
 
 CSSParserValue& CSSParser::sinkFloatingValue(CSSParserValue& value)
 {
     if (value.unit == CSSParserValue::Function) {
         ASSERT(m_floatingFunctions.contains(value.function));
         m_floatingFunctions.remove(value.function);
     }
     return value;
 }
 
-MediaQueryExp* CSSParser::createFloatingMediaQueryExp(const AtomicString& mediaFeature, CSSParserValueList* values)
+MediaQueryExp* CSSParser::createFloatingMediaQueryExp(const String& mediaFeature, CSSParserValueList* values)
 {
     m_floatingMediaQueryExp = MediaQueryExp::create(mediaFeature, values);
     return m_floatingMediaQueryExp.get();
 }
 
 PassOwnPtr<MediaQueryExp> CSSParser::sinkFloatingMediaQueryExp(MediaQueryExp* expression)
 {
     ASSERT_UNUSED(expression, expression == m_floatingMediaQueryExp);
     return m_floatingMediaQueryExp.release();
 }
@@ skipping 990 matching lines @@
 {
     // The tokenizer checks for the construct of an+b.
     // However, since the {ident} rule precedes the {nth} rule, some of those
     // tokens are identified as string literal. Furthermore we need to accept
     // "odd" and "even" which does not match to an+b.
     return equalIgnoringCase(token, "odd") || equalIgnoringCase(token, "even")
         || equalIgnoringCase(token, "n") || equalIgnoringCase(token, "-n");
 }
 
 }