Remove MediaValues' dependency on RenderStyle

Source/core/css/MediaQueryMatcher.cpp

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  *  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
@@ skipping 59 matching lines @@
         return nullAtom;
 
     return m_document->frame()->view()->mediaType();
 }
 
 PassOwnPtr<MediaQueryEvaluator> MediaQueryMatcher::prepareEvaluator() const
 {
     if (!m_document || !m_document->frame())
         return nullptr;
 
-    Element* documentElement = m_document->documentElement();
-    if (!documentElement)
-        return nullptr;
-
-    StyleResolver& styleResolver = m_document->ensureStyleResolver();
-    RefPtr<RenderStyle> rootStyle = styleResolver.styleForElement(documentElement, 0 /*defaultParent*/, DisallowStyleSharing, MatchOnlyUserAgentRules);

[eseidel, 2014/04/19 00:42:15]

Yes, you're removing this recalc, so it's not surprisng that those number go
down.

-
-    return adoptPtr(new MediaQueryEvaluator(mediaType(), m_document->frame(), rootStyle.get()));
+    return adoptPtr(new MediaQueryEvaluator(mediaType(), m_document->frame()));
 }
 
 bool MediaQueryMatcher::evaluate(const MediaQuerySet* media)
 {
     if (!media)
         return false;
 
     OwnPtr<MediaQueryEvaluator> evaluator(prepareEvaluator());
     return evaluator && evaluator->eval(media);
 }
@@ skipping 56 matching lines @@
 void MediaQueryMatcher::trace(Visitor* visitor)
 {
     // We don't support tracing of vectors of OwnPtrs (ie. Vector<OwnPtr<Listener> >).
     // Since this is a transitional object we are just ifdef'ing it out when oilpan is not enabled.
 #if ENABLE(OILPAN)
     visitor->trace(m_listeners);
 #endif
 }
 
 }