Mark correct tree-scope dirty removing link in shadow.

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

 /*
  * Copyright (C) 2006, 2007 Rob Buis
  * Copyright (C) 2008 Apple, Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 59 matching lines @@
   return process(element);
 }
 
 void StyleElement::removedFrom(Element& element,
                                ContainerNode* insertionPoint) {
   if (!insertionPoint->isConnected())
     return;
 
   Document& document = element.document();
   if (m_registeredAsCandidate) {
-    ShadowRoot* shadowRoot = element.containingShadowRoot();
-    if (!shadowRoot)
-      shadowRoot = insertionPoint->containingShadowRoot();
-
-    document.styleEngine().removeStyleSheetCandidateNode(
-        element, shadowRoot ? *toTreeScope(shadowRoot) : toTreeScope(document));
+    document.styleEngine().removeStyleSheetCandidateNode(element,
+                                                         *insertionPoint);
     m_registeredAsCandidate = false;
   }
 
   StyleSheet* removedSheet = m_sheet.get();
 
   if (m_sheet)
     clearSheet(element);
   if (removedSheet)
     document.styleEngine().setNeedsActiveStyleUpdate(removedSheet,
                                                      AnalyzedStyleUpdate);
@@ skipping 108 matching lines @@
 
 void StyleElement::startLoadingDynamicSheet(Document& document) {
   document.styleEngine().addPendingSheet(m_styleEngineContext);
 }
 
 DEFINE_TRACE(StyleElement) {
   visitor->trace(m_sheet);
 }
 
 }  // namespace blink