Mark correct tree-scope dirty removing link in shadow.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
@@ skipping 202 matching lines @@
   TreeScopeStyleSheetCollection* collection =
       ensureStyleSheetCollectionFor(treeScope);
   DCHECK(collection);
   collection->addStyleSheetCandidateNode(node);
 
   markTreeScopeDirty(treeScope);
   if (treeScope != m_document)
     m_activeTreeScopes.add(&treeScope);
 }
 
-void StyleEngine::removeStyleSheetCandidateNode(Node& node) {
-  removeStyleSheetCandidateNode(node, *m_document);
-}
+void StyleEngine::removeStyleSheetCandidateNode(Node& node,
+                                                ContainerNode& insertionPoint) {
+  DCHECK(!isXSLStyleSheet(node));
+  DCHECK(insertionPoint.isConnected());
 
-void StyleEngine::removeStyleSheetCandidateNode(Node& node,
-                                                TreeScope& treeScope) {
-  DCHECK(!isXSLStyleSheet(node));
+  ShadowRoot* shadowRoot = node.containingShadowRoot();
+  if (!shadowRoot)
+    shadowRoot = insertionPoint.containingShadowRoot();
 
+  TreeScope& treeScope =
+      shadowRoot ? *toTreeScope(shadowRoot) : toTreeScope(document());
   TreeScopeStyleSheetCollection* collection =
       styleSheetCollectionFor(treeScope);
   // After detaching document, collection could be null. In the case,
   // we should not update anything. Instead, just return.
   if (!collection)
     return;
   collection->removeStyleSheetCandidateNode(node);
 
   markTreeScopeDirty(treeScope);
 }
@@ skipping 1000 matching lines @@
 }
 
 DEFINE_TRACE_WRAPPERS(StyleEngine) {
   for (auto sheet : m_injectedAuthorStyleSheets) {
     visitor->traceWrappers(sheet);
   }
   visitor->traceWrappers(m_documentStyleSheetCollection);
 }
 
 }  // namespace blink