DevTools: Do not unbind stylesheets in multiframe documents

Source/core/inspector/InspectorCSSAgent.cpp

 /*
  * Copyright (C) 2010, 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 718 matching lines @@
 {
     if (namedFlow->flowState() == NamedFlow::FlowStateNull)
         return;
 
     ErrorString errorString;
     RefPtr<NamedFlow> protector(namedFlow);
 
     m_frontend->regionLayoutUpdated(buildObjectForNamedFlow(&errorString, namedFlow, documentNodeId));
 }
 
-void InspectorCSSAgent::activeStyleSheetsUpdated(const Vector<RefPtr<StyleSheet> >& newSheets)
+void InspectorCSSAgent::activeStyleSheetsUpdated(Document* document, const Vector<RefPtr<StyleSheet> >& newSheets)
 {
     HashSet<CSSStyleSheet*> removedSheets;
     for (CSSStyleSheetToInspectorStyleSheet::iterator it = m_cssStyleSheetToInspectorStyleSheet.begin(); it != m_cssStyleSheetToInspectorStyleSheet.end(); ++it) {
-        if (it->value->canBind())
+        if (it->value->canBind() && (!it->key->ownerDocument() || it->key->ownerDocument() == document))

[vsevik, 2013/05/07 08:11:47]

Please make sure this works correctly for seamless iframe.

             removedSheets.add(it->key);
     }
 
     Vector<CSSStyleSheet*> newSheetsVector;
     for (size_t i = 0, size = newSheets.size(); i < size; ++i) {
         StyleSheet* newSheet = newSheets.at(i).get();
         if (newSheet->isCSSStyleSheet()) {
             StyleSheetAppender appender(m_cssStyleSheetToInspectorStyleSheet, newSheetsVector);
             appender.run(static_cast<CSSStyleSheet*>(newSheet));
         }
@@ skipping 710 matching lines @@
             documentsToChange.add(element->ownerDocument());
     }
 
     m_nodeIdToForcedPseudoState.clear();
     for (HashSet<Document*>::iterator it = documentsToChange.begin(), end = documentsToChange.end(); it != end; ++it)
         (*it)->styleResolverChanged(RecalcStyleImmediately);
 }
 
 } // namespace WebCore