Stash ComputedStyles on new HeapHashMap on Document.

third_party/WebKit/Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc.
  * All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
@@ skipping 1928 matching lines @@
 
   StyleRecalcChange localChange =
       ComputedStyle::stylePropagationDiff(oldStyle.get(), newStyle.get());
   if (localChange == NoChange) {
     INCREMENT_STYLE_STATS_COUNTER(document().styleEngine(), stylesUnchanged, 1);
   } else {
     INCREMENT_STYLE_STATS_COUNTER(document().styleEngine(), stylesChanged, 1);
   }
 
   if (localChange == Reattach) {
-    // TODO(nainar): Remove the style parameter being passed into
-    // buildLayoutTree().  ComputedStyle will now be stored on Node and accessed
-    // in buildLayoutTree() using mutableComputedStyle().
-    return rebuildLayoutTree(*newStyle);
+    document().addNonAttachedStyle(*this, std::move(newStyle));
+    return rebuildLayoutTree();
   }
 
   DCHECK(oldStyle);
 
   if (localChange != NoChange)
     updateCallbackSelectors(oldStyle.get(), newStyle.get());
 
   if (LayoutObject* layoutObject = this->layoutObject()) {
     if (localChange != NoChange ||
         pseudoStyleCacheIsInvalid(oldStyle.get(), newStyle.get()) ||
@@ skipping 21 matching lines @@
         return Inherit;
       newStyle->copyChildDependentFlagsFrom(*oldStyle);
     }
     if (oldStyle->hasPseudoElementStyle() || newStyle->hasPseudoElementStyle())
       return UpdatePseudoElements;
   }
 
   return localChange;
 }
 
-StyleRecalcChange Element::rebuildLayoutTree(ComputedStyle& newStyle) {
+StyleRecalcChange Element::rebuildLayoutTree() {
   AttachContext reattachContext;
-  reattachContext.resolvedStyle = &newStyle;
+  reattachContext.resolvedStyle = document().getNonAttachedStyle(*this).get();

[esprehn, 2016/10/05 03:37:22]

-get

[nainar, 2016/10/05 04:33:12]

Done.

   bool layoutObjectWillChange = needsAttach() || layoutObject();
   reattachLayoutTree(reattachContext);
   if (layoutObjectWillChange || layoutObject())
     return Reattach;
   return ReattachNoLayoutObject;
 }
 
 void Element::updateCallbackSelectors(const ComputedStyle* oldStyle,
                                       const ComputedStyle* newStyle) {
   Vector<String> emptyVector;
@@ skipping 2074 matching lines @@
 }
 
 DEFINE_TRACE_WRAPPERS(Element) {
   if (hasRareData()) {
     visitor->traceWrappers(elementRareData());
   }
   ContainerNode::traceWrappers(visitor);
 }
 
 }  // namespace blink