:hover style not applied on hover if its display property is different from original style's

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 1050 matching lines @@
         if (node == this)
             return true;
         if (node->isDocumentFragment() && static_cast<const DocumentFragment*>(node)->isTemplateContent())
             node = static_cast<const TemplateContentDocumentFragment*>(node)->host();
         else
             node = node->parentOrShadowHostNode();
     }
     return false;
 }
 
-void Node::attach()
+void Node::attach(const AttachContext&)
 {
     ASSERT(!attached());
     ASSERT(!renderer() || (renderer()->style() && (renderer()->parent() || renderer()->isRenderView())));
 
     // If this node got a renderer it may be the previousRenderer() of sibling text nodes and thus affect the
     // result of Text::textRendererIsNeeded() for those nodes.
     if (renderer()) {
         for (Node* next = nextSibling(); next; next = next->nextSibling()) {
             if (next->renderer())
                 break;
@@ skipping 22 matching lines @@
 
 #ifndef NDEBUG
 static Node* detachingNode;
 
 bool Node::inDetach() const
 {
     return detachingNode == this;
 }
 #endif
 
-void Node::detach()
+void Node::detach(const AttachContext& context)
 {
 #ifndef NDEBUG
     ASSERT(!detachingNode);
     detachingNode = this;
 #endif
 
     if (renderer())
         renderer()->destroyAndCleanupAnonymousWrappers();
     setRenderer(0);
 
-    Document* doc = document();
-    if (isUserActionElement()) {
-        if (hovered())
-            doc->hoveredNodeDetached(this);
-        if (inActiveChain())
-            doc->activeChainNodeDetached(this);
-        doc->userActionElements().didDetach(this);
+    // 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);
+        }
     }
 
     clearFlag(IsAttachedFlag);
 
 #ifndef NDEBUG
     detachingNode = 0;
 #endif
 }
 
 // FIXME: This code is used by editing.  Seems like it could move over there and not pollute Node.
@@ skipping 1620 matching lines @@
         node->showTreeForThis();
 }
 
 void showNodePath(const WebCore::Node* node)
 {
     if (node)
         node->showNodePathForThis();
 }
 
 #endif