DevTools: Support XHR async call stacks in the debugger.

Source/core/inspector/AsyncCallStackTracker.h

 /*
  * 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 26 matching lines @@
 #include "wtf/HashSet.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 class EventListener;
 class EventTarget;
 class ExecutionContext;
+class XMLHttpRequest;
 
 class AsyncCallStackTracker {
     WTF_MAKE_NONCOPYABLE(AsyncCallStackTracker);
 public:
     class AsyncCallStack : public RefCounted<AsyncCallStack> {
     public:
         AsyncCallStack(const String&, const ScriptValue&);
         ~AsyncCallStack();
         String description() const { return m_description; }
         ScriptValue callFrames() const { return m_callFrames; }
@@ skipping 26 matching lines @@
 
     void didRequestAnimationFrame(ExecutionContext*, int callbackId, const ScriptValue& callFrames);
     void didCancelAnimationFrame(ExecutionContext*, int callbackId);
     void willFireAnimationFrame(ExecutionContext*, int callbackId);
 
     void didAddEventListener(EventTarget*, const AtomicString& eventType, EventListener*, bool useCapture, const ScriptValue& callFrames);
     void didRemoveEventListener(EventTarget*, const AtomicString& eventType, EventListener*, bool useCapture);
     void didRemoveAllEventListeners(EventTarget*);
     void willHandleEvent(EventTarget*, const AtomicString& eventType, EventListener*, bool useCapture);
 
+    void willLoadXHR(XMLHttpRequest*, const ScriptValue& callFrames);
+
     void didFireAsyncCall();
     void clear();
 
 private:
+    void willHandleXHREvent(XMLHttpRequest*, EventTarget*, const AtomicString& eventType);
+
     PassRefPtr<AsyncCallChain> createAsyncCallChain(const String& description, const ScriptValue& callFrames);
     void setCurrentAsyncCallChain(PassRefPtr<AsyncCallChain>);
+    void clearCurrentAsyncCallChain();
     static void ensureMaxAsyncCallChainDepth(AsyncCallChain*, unsigned);
     static bool validateCallFrames(const ScriptValue& callFrames);
 
     class ExecutionContextData;
     ExecutionContextData* createContextDataIfNeeded(ExecutionContext*);
 
     unsigned m_maxAsyncCallStackDepth;
     RefPtr<AsyncCallChain> m_currentAsyncCallChain;
     unsigned m_nestedAsyncCallCount;
     typedef HashMap<ExecutionContext*, ExecutionContextData*> ExecutionContextDataMap;
     ExecutionContextDataMap m_executionContextDataMap;
 };
 
 } // namespace WebCore
 
 #endif // !defined(AsyncCallStackTracker_h)