DevTools: log worker thread ids on the main thread when Timeline recording is enabled

Source/core/workers/WorkerInspectorProxy.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "core/workers/WorkerInspectorProxy.h"
 
 #include "core/dom/CrossThreadTask.h"
 #include "core/inspector/InspectorInstrumentation.h"
+#include "core/inspector/InspectorTraceEvents.h"
 #include "core/inspector/WorkerInspectorController.h"
 #include "core/workers/WorkerThread.h"
 #include "platform/TraceEvent.h"
 #include "platform/weborigin/KURL.h"
 
 namespace blink {
 
 WorkerInspectorProxy::WorkerInspectorProxy()
     : m_workerThread(0)
     , m_executionContext(0)
@@ skipping 58 matching lines @@
 }
 
 void WorkerInspectorProxy::sendMessageToInspector(const String& message)
 {
     if (!m_workerThread)
         return;
     m_workerThread->postDebuggerTask(createCrossThreadTask(dispatchOnInspectorBackendTask, String(message)));
     m_workerThread->interruptAndDispatchInspectorCommands();
 }
 
-static void dispatchWriteTimelineStartedEvent(ExecutionContext* context, const String& sessionId)
-{
-    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "TracingStartedInWorker", "sessionId", sessionId.utf8());
-}
-
 void WorkerInspectorProxy::writeTimelineStartedEvent(const String& sessionId)
 {
     if (!m_workerThread)
         return;
-    m_workerThread->postTask(createCrossThreadTask(dispatchWriteTimelineStartedEvent, String(sessionId)));
+    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "TracingSessionIdForWorker", "data", InspectorTracingSessionIdForWorkerEvent::data(sessionId, m_workerThread));
 }
 
 } // namespace blink