Share recalcChildStyle between Element and ShadowRoot.

Source/core/dom/shadow/ShadowRoot.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 122 matching lines @@
 void ShadowRoot::recalcStyle(StyleRecalcChange change)
 {
     // ShadowRoot doesn't support custom callbacks.
     ASSERT(!hasCustomStyleCallbacks());
 
     StyleResolverParentScope parentScope(*this);
 
     if (styleChangeType() >= SubtreeStyleChange)
         change = Force;
 
-    if (change < Force && hasRareData() && childNeedsStyleRecalc())
-        checkForChildrenAdjacentRuleChanges();
-
     // There's no style to update so just calling recalcStyle means we're updated.
     clearNeedsStyleRecalc();
 
-    // FIXME: This doesn't handle :hover + div properly like Element::recalcStyle does.
-    Text* lastTextNode = 0;
-    for (Node* child = lastChild(); child; child = child->previousSibling()) {
-        if (child->isTextNode()) {
-            toText(child)->recalcTextStyle(change, lastTextNode);
-            lastTextNode = toText(child);
-        } else if (child->isElementNode()) {
-            if (child->shouldCallRecalcStyle(change))
-                toElement(child)->recalcStyle(change, lastTextNode);
-            if (child->renderer())
-                lastTextNode = 0;
-        }
-    }
-
+    recalcChildStyle(change);
     clearChildNeedsStyleRecalc();
 }
 
 void ShadowRoot::attach(const AttachContext& context)
 {
     StyleResolverParentScope parentScope(*this);
     DocumentFragment::attach(context);
 }
 
 Node::InsertionNotificationRequest ShadowRoot::insertedInto(ContainerNode* insertionPoint)
@@ skipping 163 matching lines @@
 void ShadowRoot::trace(Visitor* visitor)
 {
     visitor->trace(m_prev);
     visitor->trace(m_next);
     visitor->trace(m_shadowRootRareData);
     TreeScope::trace(visitor);
     DocumentFragment::trace(visitor);
 }
 
 }