Cleanly detach XHR and other pending loader clients from Inspector.

third_party/WebKit/Source/modules/fetch/FetchManager.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/fetch/FetchManager.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8ThrowException.h"
@@ skipping 658 matching lines @@
 
   // "- Otherwise
   //     Set |request|'s response tainting to |CORS|."
   m_request->setResponseTainting(FetchRequestData::CORSTainting);
   // "The result of performing an HTTP fetch using |request| with the
   // |CORS flag| set."
   performHTTPFetch(true, false);
 }
 
 void FetchManager::Loader::dispose() {
+  InspectorInstrumentation::detachClientRequest(m_executionContext, this);
   // Prevent notification
   m_fetchManager = nullptr;
   if (m_loader) {
     m_loader->cancel();
     m_loader = nullptr;
   }
   m_executionContext = nullptr;
 }
 
 void FetchManager::Loader::performBasicFetch() {
@@ skipping 243 matching lines @@
   m_loaders.remove(loader);
   loader->dispose();
 }
 
 DEFINE_TRACE(FetchManager) {
   visitor->trace(m_loaders);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink