Track lastTextNode during rebuildLayoutTree.

third_party/WebKit/Source/core/css/resolver/SharedStyleFinder.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc.
  * All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
@@ skipping 43 matching lines @@
 #include "platform/instrumentation/tracing/TraceEvent.h"
 #include "wtf/HashSet.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 inline ComputedStyle* getElementStyle(Element& element) {
   if (element.needsReattachLayoutTree()) {
-    StyleReattachData styleReattachData =
-        element.document().getStyleReattachData(element);
-    if (styleReattachData.computedStyle)
-      return styleReattachData.computedStyle.get();
+    if (ComputedStyle* computedStyle =
+            element.document().getNonAttachedStyle(element))
+      return computedStyle;
   }
   return element.mutableComputedStyle();
 }
 
 bool SharedStyleFinder::canShareStyleWithControl(Element& candidate) const {
   if (!isHTMLInputElement(candidate) || !isHTMLInputElement(element()))
     return false;
 
   HTMLInputElement& candidateInput = toHTMLInputElement(candidate);
   HTMLInputElement& thisInput = toHTMLInputElement(element());
@@ skipping 336 matching lines @@
   if (!element().parentElementOrShadowRoot()->childrenSupportStyleSharing()) {
     INCREMENT_STYLE_STATS_COUNTER(document().styleEngine(),
                                   sharedStyleRejectedByParent, 1);
     return nullptr;
   }
 
   return getElementStyle(*shareElement);
 }
 
 }  // namespace blink