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

Source/core/workers/WorkerThread.cpp

Index: Source/core/workers/WorkerThread.cpp
diff --git a/Source/core/workers/WorkerThread.cpp b/Source/core/workers/WorkerThread.cpp
index 988256e367b9a256b1245ff2fdac409fb9aa786d..688ae2f09d43c5e0d563d06dad9ffb780e3aebcb 100644
--- a/Source/core/workers/WorkerThread.cpp
+++ b/Source/core/workers/WorkerThread.cpp
@@ -236,6 +236,13 @@ void WorkerThread::interruptAndDispatchInspectorCommands()
         m_workerInspectorController->interruptAndDispatchInspectorCommands();
 }
 
+PlatformThreadId WorkerThread::platformThreadId() const
+{
+    if (!m_thread)

[loislo, 2014/09/09 13:59:44]

Looks like it could be converted into ASSERT

[yurys, 2014/09/09 15:08:37]

In theory WorkerThread::start can be called asynchronously after WorkerThread
constructor so I'd rather leave this check. It might make sense to merge
WorkerThread::start into the constructor.

+        return 0;
+    return m_thread->threadId();
+}
+
 void WorkerThread::initialize()
 {
     KURL scriptURL = m_startupData->m_scriptURL;