Rename RenderStyle::diff and RenderStyle::compare to better names

Source/core/dom/Document.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 1766 matching lines @@
         change = Force;
 
     // FIXME: Cannot access the ensureStyleResolver() before calling styleForDocument below because
     // apparently the StyleResolver's constructor has side effects. We should fix it.
     // See printing/setPrinting.html, printing/width-overflow.html though they only fail on
     // mac when accessing the resolver by what appears to be a viewport size difference.
 
     if (change == Force) {
         m_hasNodesWithPlaceholderStyle = false;
         RefPtr<RenderStyle> documentStyle = StyleResolver::styleForDocument(*this, m_styleEngine->fontSelector());
-        StyleRecalcChange localChange = RenderStyle::compare(documentStyle.get(), renderView()->style());
+        StyleRecalcChange localChange = RenderStyle::stylePropagationDiff(documentStyle.get(), renderView()->style());
         if (localChange != NoChange)
             renderView()->setStyle(documentStyle.release());
     }
 
     clearNeedsStyleRecalc();
 
     // Uncomment to enable printing of statistics about style sharing and the matched property cache.
     // Optionally pass StyleResolver::ReportSlowStats to print numbers that require crawling the
     // entire DOM (where collecting them is very slow).
     // FIXME: Expose this as a runtime flag.
@@ skipping 3693 matching lines @@
 }
 
 void Document::invalidateNodeListCaches(const QualifiedName* attrName)
 {
     HashSet<LiveNodeListBase*>::iterator end = m_listsInvalidatedAtDocument.end();
     for (HashSet<LiveNodeListBase*>::iterator it = m_listsInvalidatedAtDocument.begin(); it != end; ++it)
         (*it)->invalidateCache(attrName);
 }
 
 } // namespace WebCore