Introduce setNeedsActiveStyleUpdate for adding/removing stylesheets.

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 88 matching lines @@
     if (m_registeredAsCandidate) {
         document.styleEngine().removeStyleSheetCandidateNode(element, shadowRoot ? *toTreeScope(shadowRoot) : toTreeScope(document));
         m_registeredAsCandidate = false;
     }
 
     RefPtrWillBeRawPtr<StyleSheet> removedSheet = m_sheet.get();
 
     if (m_sheet)
         clearSheet(element);
     if (removedSheet)
-        document.removedStyleSheet(removedSheet.get(), AnalyzedStyleUpdate);
+        document.styleEngine().setNeedsActiveStyleUpdate(removedSheet.get(), AnalyzedStyleUpdate);
 }
 
 void StyleElement::clearDocumentData(Document& document, Element* element)
 {
     if (m_sheet)
         m_sheet->clearOwnerNode();
 
     if (m_registeredAsCandidate) {
         ASSERT(element->inDocument());
         document.styleEngine().removeStyleSheetCandidateNode(element, element->treeScope());
@@ skipping 111 matching lines @@
 {
     document.styleEngine().addPendingSheet();
 }
 
 DEFINE_TRACE(StyleElement)
 {
     visitor->trace(m_sheet);
 }
 
 } // namespace blink