DevTools: Async call stacks for window.postMessage()

Source/core/inspector/InspectorDebuggerAgent.h

Index: Source/core/inspector/InspectorDebuggerAgent.h
diff --git a/Source/core/inspector/InspectorDebuggerAgent.h b/Source/core/inspector/InspectorDebuggerAgent.h
index 45708b284bcb8254d6a1c35d74fbd1a6b20a368d..fc2d5e972468035ec22e6a528db6d30438e91bc7 100644
--- a/Source/core/inspector/InspectorDebuggerAgent.h
+++ b/Source/core/inspector/InspectorDebuggerAgent.h
@@ -165,6 +165,11 @@ public:
     void didKillAllExecutionContextTasks(ExecutionContext*);
     void willPerformExecutionContextTask(ExecutionContext*, ExecutionContextTask*);
     void didPerformExecutionContextTask();
+    int traceAsyncOperationStarting(ExecutionContext*, const String& operationName);
+    void traceAsyncOperationCompleted(ExecutionContext*, int operationId);
+    void traceAsyncOperationCompletedCallbackStarting(ExecutionContext*, int operationId);
+    void traceAsyncCallbackStarting(ExecutionContext*, int operationId);
+    void traceAsyncCallbackCompleted();
     bool canBreakProgram();
     void breakProgram(InspectorFrontend::Debugger::Reason::Enum breakReason, PassRefPtr<JSONObject> data);
     void scriptExecutionBlockedByCSP(const String& directiveText);