Get rid of ensureStyleResolver().

sky/engine/core/dom/StyleEngine.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 57 matching lines @@
 void StyleEngine::removeTreeScope(TreeScope& scope)
 {
     m_activeTreeScopes.remove(&scope);
 }
 
 void StyleEngine::updateActiveStyleSheets()
 {
     ASSERT(!m_document->inStyleRecalc());
     ASSERT(m_resolver);
 
-    StyleResolver& resolver = m_document->ensureStyleResolver();
-
-    resolver.resetMediaQueryAffectedByViewportChange();
+    m_resolver->resetMediaQueryAffectedByViewportChange();
 
     for (TreeScope* treeScope : m_activeTreeScopes)
         treeScope->scopedStyleResolver().updateActiveStyleSheets();
 
     updateDocumentFonts();
 }
 
 void StyleEngine::resolverChanged()
 {
     if (!m_document->isActive())
@@ skipping 69 matching lines @@
     m_sheetToTextCache.remove(contents);
 }
 
 void StyleEngine::fontsNeedUpdate(CSSFontSelector*)
 {
     m_resolver->invalidateMatchedPropertiesCache();
     m_document->setNeedsStyleRecalc(SubtreeStyleChange);
 }
 
 }