DevTools: Fix async stacks instrumentation for XHRs.

Source/core/inspector/InspectorInstrumentation.idl

 /*
 * Copyright (C) 2013 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
@@ skipping 220 matching lines @@
 
     [Page, Inline=FastReturn]
     void didResizeMainFrame(Page*);
 
     [Timeline, Inline=FastReturn]
     InspectorInstrumentationCookie willDispatchXHRLoadEvent([Keep] ExecutionContext*, XMLHttpRequest*);
 
     [Timeline, Inline=FastReturn]
     void didDispatchXHRLoadEvent(const InspectorInstrumentationCookie&);
 
+    [Debugger, Inline=FastReturn]
+    void didDispatchXHRLoadendEvent(ExecutionContext*, XMLHttpRequest*);
+
     [Timeline, Inline=FastReturn]
     void willScrollLayer([Keep] RenderObject*);
 
     [Timeline, Inline=FastReturn]
     void didScrollLayer(RenderObject*);
 
     [Timeline, Inline=FastReturn]
     void willPaint([Keep] RenderObject*, const GraphicsLayer*);
 
     [Timeline, Page, LayerTree, Inline=FastReturn]
@@ skipping 256 matching lines @@
 interface InspectorCanvasInstrumentation {
 
 #include "bindings/core/v8/ScriptValue.h"
 
     [Canvas]
     ScriptValue wrapCanvas2DRenderingContextForInstrumentation(Document*, const ScriptValue&);
 
     [Canvas]
     ScriptValue wrapWebGLRenderingContextForInstrumentation(Document*, const ScriptValue&);
 }