DevTools: Support XHR async call stacks in the debugger.

Source/core/inspector/InspectorDebuggerAgent.cpp

 /*
  * Copyright (C) 2010 Apple Inc. All rights reserved.
- * Copyright (C) 2010-2011 Google Inc. All rights reserved.
+ * 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:
  *
  * 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
  *     documentation and/or other materials provided with the distribution.
@@ skipping 724 matching lines @@
         m_asyncCallStackTracker.willHandleEvent(eventTarget, eventType, listener, useCapture);
 }
 
 void InspectorDebuggerAgent::didHandleEvent()
 {
     if (m_asyncCallStackTracker.isEnabled())
         m_asyncCallStackTracker.didFireAsyncCall();
     cancelPauseOnNextStatement();
 }
 
+void InspectorDebuggerAgent::willLoadXHR(XMLHttpRequest* xhr, ThreadableLoaderClient*, const AtomicString&, const KURL&, bool async, PassRefPtr<FormData>, const HTTPHeaderMap&, bool)
+{
+    if (m_asyncCallStackTracker.isEnabled() && async)
+        m_asyncCallStackTracker.willLoadXHR(xhr, scriptDebugServer().currentCallFrames());
+}
+
 void InspectorDebuggerAgent::pause(ErrorString*)
 {
     if (m_javaScriptPauseScheduled)
         return;
     clearBreakDetails();
     scriptDebugServer().setPauseOnNextStatement(true);
     m_javaScriptPauseScheduled = true;
 }
 
 void InspectorDebuggerAgent::resume(ErrorString* errorString)
@@ skipping 440 matching lines @@
 {
     m_scripts.clear();
     m_breakpointIdToDebugServerBreakpointIds.clear();
     m_asyncCallStackTracker.clear();
     if (m_frontend)
         m_frontend->globalObjectCleared();
 }
 
 } // namespace WebCore