Store nonAttachedStyle on NodeLayoutData instead of on HashMap in Document.

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 "platform/wtf/HashSet.h"
 #include "platform/wtf/text/AtomicString.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 inline ComputedStyle* GetElementStyle(Element& element) {
   if (element.NeedsReattachLayoutTree()) {
-    if (ComputedStyle* computed_style =
-            element.GetDocument().GetNonAttachedStyle(element))
+    if (ComputedStyle* computed_style = element.GetNonAttachedStyle())
       return computed_style;
   }
   return element.MutableComputedStyle();
 }
 
 bool SharedStyleFinder::CanShareStyleWithControl(Element& candidate) const {
   if (!isHTMLInputElement(candidate) || !isHTMLInputElement(GetElement()))
     return false;
 
   HTMLInputElement& candidate_input = toHTMLInputElement(candidate);
@@ skipping 345 matching lines @@
            ->ChildrenSupportStyleSharing()) {
     INCREMENT_STYLE_STATS_COUNTER(GetDocument().GetStyleEngine(),
                                   shared_style_rejected_by_parent, 1);
     return nullptr;
   }
 
   return GetElementStyle(*share_element);
 }
 
 }  // namespace blink