Remove REM units.

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 29 matching lines @@
 #include "sky/engine/core/html/imports/HTMLImportsController.h"
 #include "sky/engine/core/page/Page.h"
 
 namespace blink {
 
 StyleEngine::StyleEngine(Document& document)
     : m_document(&document)
     , m_isMaster(!document.importsController() || document.importsController()->master() == &document)
     , m_documentStyleSheetCollection(DocumentStyleSheetCollection::create(document))
     , m_documentScopeDirty(true)
-    , m_usesRemUnits(false)
     , m_ignorePendingStylesheets(false)
     // We don't need to create CSSFontSelector for imported document or
     // HTMLTemplateElement's document, because those documents have no frame.
     , m_fontSelector(document.frame() ? CSSFontSelector::create(&document) : nullptr)
 {
     if (m_fontSelector)
         m_fontSelector->registerForInvalidationCallbacks(this);
 }
 
 StyleEngine::~StyleEngine()
@@ skipping 168 matching lines @@
         TreeScope* treeScope = *it;
         ASSERT(treeScope != m_document);
         ShadowTreeStyleSheetCollection* collection = static_cast<ShadowTreeStyleSheetCollection*>(styleSheetCollectionFor(*treeScope));
         ASSERT(collection);
         collection->updateActiveStyleSheets(this);
         if (!collection->hasStyleSheetCandidateNodes())
             treeScopesRemoved.add(treeScope);
     }
     m_activeTreeScopes.removeAll(treeScopesRemoved);
 
-    m_usesRemUnits = documentStyleSheetCollection()->usesRemUnits();
-
     m_dirtyTreeScopes.clear();
     m_documentScopeDirty = false;
 }
 
 void StyleEngine::didRemoveShadowRoot(ShadowRoot* shadowRoot)
 {
     if (shadowRoot->scopedStyleResolver())
         removeScopedStyleResolver(shadowRoot->scopedStyleResolver());
     m_styleSheetCollectionMap.remove(shadowRoot);
 }
@@ skipping 167 matching lines @@
 {
     if (!document().isActive())
         return;
 
     if (m_resolver)
         m_resolver->invalidateMatchedPropertiesCache();
     document().setNeedsStyleRecalc(SubtreeStyleChange);
 }
 
 }