Cleanly detach XHR and other pending loader clients from Inspector.

third_party/WebKit/Source/modules/eventsource/EventSource.h

 /*
  * Copyright (C) 2009, 2012 Ericsson AB. All rights reserved.
  * Copyright (C) 2010 Apple 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.
@@ skipping 41 matching lines @@
 class ResourceResponse;
 
 class MODULES_EXPORT EventSource final
     : public EventTargetWithInlineData,
       private ThreadableLoaderClient,
       public ActiveScriptWrappable<EventSource>,
       public ContextLifecycleObserver,
       public EventSourceParser::Client {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(EventSource);
+  USING_PRE_FINALIZER(EventSource, dispose);
 
  public:
   static EventSource* create(ExecutionContext*,
                              const String& url,
                              const EventSourceInit&,
                              ExceptionState&);
   ~EventSource() override;
 
   static const unsigned long long defaultReconnectDelay;
 
@@ skipping 23 matching lines @@
   void contextDestroyed(ExecutionContext*) override;
 
   // ScriptWrappable
   bool hasPendingActivity() const final;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   EventSource(ExecutionContext*, const KURL&, const EventSourceInit&);
 
+  void dispose();
+
   void didReceiveResponse(unsigned long,
                           const ResourceResponse&,
                           std::unique_ptr<WebDataConsumerHandle>) override;
   void didReceiveData(const char*, unsigned) override;
   void didFinishLoading(unsigned long, double) override;
   void didFail(const ResourceError&) override;
   void didFailAccessControlCheck(const ResourceError&) override;
   void didFailRedirectCheck() override;
 
   void onMessageEvent(const AtomicString& event,
@@ skipping 21 matching lines @@
   Member<ThreadableLoader> m_loader;
   TaskRunnerTimer<EventSource> m_connectTimer;
 
   unsigned long long m_reconnectDelay;
   String m_eventStreamOrigin;
 };
 
 }  // namespace blink
 
 #endif  // EventSource_h