DevTools: disable CSS agent on disconnect.

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 393 matching lines @@
 
 void InspectorCSSAgent::setFrontend(InspectorFrontend* frontend)
 {
     ASSERT(!m_frontend);
     m_frontend = frontend->css();
 }
 
 void InspectorCSSAgent::clearFrontend()
 {
     ASSERT(m_frontend);
+    ErrorString error;
+    disable(&error);
     m_frontend = 0;
     resetNonPersistentData();
 }
 
 void InspectorCSSAgent::discardAgent()
 {
     m_domAgent->setDOMListener(0);
     m_domAgent = 0;
 }
 
@@ skipping 76 matching lines @@
     Vector<Document*> documents = m_domAgent->documents();
     for (Vector<Document*>::iterator it = documents.begin(); it != documents.end(); ++it)
         updateActiveStyleSheets(*it, InitialFrontendLoad);
 
     if (callback)
         callback->sendSuccess();
 }
 
 void InspectorCSSAgent::disable(ErrorString*)
 {
+    reset();
     m_instrumentingAgents->setInspectorCSSAgent(0);
     m_state->setBoolean(CSSAgentState::cssAgentEnabled, false);
 }
 
 void InspectorCSSAgent::didCommitLoadForMainFrame()
 {
     reset();
 }
 
 void InspectorCSSAgent::mediaQueryResultChanged()
@@ skipping 834 matching lines @@
             documentsToChange.add(element->ownerDocument());
     }
 
     m_nodeIdToForcedPseudoState.clear();
     for (HashSet<Document*>::iterator it = documentsToChange.begin(), end = documentsToChange.end(); it != end; ++it)
         (*it)->setNeedsStyleRecalc(SubtreeStyleChange);
 }
 
 } // namespace WebCore