Move some Element specific code from Node::detach to Element::detach.

Source/core/dom/Node.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 680 matching lines @@
     clearChildNeedsDistributionRecalc();
 }
 
 void Node::setIsLink(bool isLink)
 {
     setFlag(isLink && !SVGImage::isInSVGImage(toElement(this)), IsLinkFlag);
 }
 
 void Node::setNeedsStyleInvalidation()
 {
+    ASSERT(isElementNode());
     setFlag(NeedsStyleInvalidationFlag);
     markAncestorsWithChildNeedsStyleInvalidation();
 }
 
 void Node::markAncestorsWithChildNeedsStyleInvalidation()
 {
     for (Node* node = parentOrShadowHostNode(); node && !node->childNeedsStyleInvalidation(); node = node->parentOrShadowHostNode())
         node->setChildNeedsStyleInvalidation();
     document().scheduleLayoutTreeUpdateIfNeeded();
 }
@@ skipping 239 matching lines @@
     // don't assert for these, but do set detachingNode to the most recent
     // Node being detached.
     ASSERT(!detachingNode || detachingNode->document() != document());
     detachingNode = this;
 #endif
 
     if (layoutObject())
         layoutObject()->destroyAndCleanupAnonymousWrappers();
     setLayoutObject(nullptr);
 
-    // Do not remove the element's hovered and active status
-    // if performing a reattach.
-    if (!context.performingReattach) {
-        Document& doc = document();
-        if (isUserActionElement()) {
-            if (hovered())
-                doc.hoveredNodeDetached(this);
-            if (inActiveChain())
-                doc.activeChainNodeDetached(this);
-            doc.userActionElements().didDetach(this);
-        }
-    }
-
     setStyleChange(NeedsReattachStyleChange);
-
-    document().styleEngine().styleInvalidator().clearInvalidation(*this);
     clearChildNeedsStyleInvalidation();
-    clearNeedsStyleInvalidation();
 
 #if ENABLE(ASSERT)
     detachingNode = nullptr;
 #endif
 }
 
 void Node::reattachWhitespaceSiblingsIfNeeded(Text* start)
 {
     for (Node* sibling = start; sibling; sibling = sibling->nextSibling()) {
         if (sibling->isTextNode() && toText(sibling)->containsOnlyWhitespace()) {
@@ skipping 1508 matching lines @@
 
 void showNodePath(const blink::Node* node)
 {
     if (node)
         node->showNodePathForThis();
     else
         fprintf(stderr, "Cannot showNodePath for (nil)\n");
 }
 
 #endif