DevTools: Capture async stacks for event listeners.

Source/core/inspector/InspectorDebuggerAgent.cpp

Index: Source/core/inspector/InspectorDebuggerAgent.cpp
diff --git a/Source/core/inspector/InspectorDebuggerAgent.cpp b/Source/core/inspector/InspectorDebuggerAgent.cpp
index aceaae4e39a91fd124d0d23e9fa00a60d50ae3c8..5c827554bae08b51383694e1ed9264e85d4d4e00 100644
--- a/Source/core/inspector/InspectorDebuggerAgent.cpp
+++ b/Source/core/inspector/InspectorDebuggerAgent.cpp
@@ -708,8 +708,30 @@ void InspectorDebuggerAgent::didFireAnimationFrame()
     m_asyncCallStackTracker.didFireAsyncCall();
 }
 
+void InspectorDebuggerAgent::didAddEventListener(EventTarget* eventTarget, const AtomicString& eventType, EventListener* listener, bool useCapture)
+{
+    if (m_asyncCallStackTracker.isEnabled())

[yurys, 2013/12/16 15:03:55]

We should be able to avoid this check by setting debugger agent to
InstrumentingAgents only when async tracker is on. Do we have debugger
instrumentation for other events?

[aandrey, 2013/12/16 15:20:22]

The Debugger agent can function both w/ and w/o async stack tracking feature.

This check here is just an optimization, so that we should not call to
scriptDebugServer unless needed.

+        m_asyncCallStackTracker.didAddEventListener(eventTarget, eventType, listener, useCapture, scriptDebugServer().currentCallFrames());
+}
+
+void InspectorDebuggerAgent::didRemoveEventListener(EventTarget* eventTarget, const AtomicString& eventType, EventListener* listener, bool useCapture)
+{
+    m_asyncCallStackTracker.didRemoveEventListener(eventTarget, eventType, listener, useCapture);
+}
+
+void InspectorDebuggerAgent::didRemoveAllEventListeners(EventTarget* eventTarget)
+{
+    m_asyncCallStackTracker.didRemoveAllEventListeners(eventTarget);
+}
+
+void InspectorDebuggerAgent::willHandleEvent(EventTarget* eventTarget, const AtomicString& eventType, EventListener* listener, bool useCapture)
+{
+    m_asyncCallStackTracker.willHandleEvent(eventTarget, eventType, listener, useCapture);
+}
+
 void InspectorDebuggerAgent::didHandleEvent()
 {
+    m_asyncCallStackTracker.didFireAsyncCall();
     cancelPauseOnNextStatement();
 }