Inspector: replace generic discardAgents logic with explicit call to discard a listener.

Source/core/inspector/InspectorCSSAgent.h

 /*
  * 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 83 matching lines @@
 
     static PassOwnPtr<InspectorCSSAgent> create(InstrumentingAgents* instrumentingAgents, InspectorCompositeState* state, InspectorDOMAgent* domAgent, InspectorPageAgent* pageAgent)
     {
         return adoptPtr(new InspectorCSSAgent(instrumentingAgents, state, domAgent, pageAgent));
     }
     ~InspectorCSSAgent();
 
     bool forcePseudoState(Element*, CSSSelector::PseudoType);
     virtual void setFrontend(InspectorFrontend*);
     virtual void clearFrontend();
-    virtual void discardAgent();
     virtual void restore();
     virtual void enable(ErrorString*);
     virtual void disable(ErrorString*);
     void reset();
     void didCommitLoad(Frame*, DocumentLoader*);
     void mediaQueryResultChanged();
     void didCreateNamedFlow(Document*, NamedFlow*);
     void willRemoveNamedFlow(Document*, NamedFlow*);
     void didUpdateRegionLayout(Document*, NamedFlow*);
     void regionLayoutUpdated(NamedFlow*, int documentNodeId);
@@ skipping 58 matching lines @@
     PassRefPtr<TypeBuilder::Array<TypeBuilder::CSS::CSSRule> > buildArrayForRuleList(CSSRuleList*, StyleResolver*);
     PassRefPtr<TypeBuilder::Array<TypeBuilder::CSS::RuleMatch> > buildArrayForMatchedRuleList(CSSRuleList*, StyleResolver*, Element*);
     PassRefPtr<TypeBuilder::CSS::CSSStyle> buildObjectForAttributesStyle(Element*);
     PassRefPtr<TypeBuilder::Array<TypeBuilder::CSS::Region> > buildArrayForRegions(ErrorString*, PassRefPtr<NodeList>, int documentNodeId);
     PassRefPtr<TypeBuilder::CSS::NamedFlow> buildObjectForNamedFlow(ErrorString*, NamedFlow*, int documentNodeId);
 
     // InspectorDOMAgent::DOMListener implementation
     virtual void didRemoveDocument(Document*);
     virtual void didRemoveDOMNode(Node*);
     virtual void didModifyDOMAttr(Element*);
+    virtual void discardListener();
 
     // InspectorCSSAgent::Listener implementation
     virtual void styleSheetChanged(InspectorStyleSheet*);
 
     void resetPseudoStates();
 
     InspectorFrontend::CSS* m_frontend;
     InspectorDOMAgent* m_domAgent;
     InspectorPageAgent* m_pageAgent;
 
@@ skipping 10 matching lines @@
 
     OwnPtr<SelectorProfile> m_currentSelectorProfile;
 
     friend class StyleSheetBinder;
 };
 
 
 } // namespace WebCore
 
 #endif // !defined(InspectorCSSAgent_h)