Avoid unnecessary invalidations on resize.

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 2052 matching lines @@
 
     m_renderView = new RenderView(this);
     setRenderer(m_renderView);
 
     m_renderView->setIsInWindow(true);
     m_renderView->setStyle(StyleResolver::styleForDocument(*this));
     view()->updateCompositingLayersAfterStyleChange();
 
     ContainerNode::attach(context);
 
-    // FTA can't update render view info while the Document is detached, so update now in case anything changed.
+    // FastTextAutosizer can't update render view info while the Document is detached, so update now in case anything changed.
     if (FastTextAutosizer* textAutosizer = fastTextAutosizer())
         textAutosizer->updatePageInfo();
 
     m_lifecycle.advanceTo(DocumentLifecycle::StyleClean);
 }
 
 void Document::detach(const AttachContext& context)
 {
     ASSERT(isActive());
     m_lifecycle.advanceTo(DocumentLifecycle::Stopping);
@@ skipping 3413 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