WorkerThread: Remove willEnterNestedLoop() and didLeaveNestedLoop().

Source/core/workers/WorkerThread.h

Index: Source/core/workers/WorkerThread.h
diff --git a/Source/core/workers/WorkerThread.h b/Source/core/workers/WorkerThread.h
index 38352bd1ad6fdb55dd0929b8f73310c828f44454..4ffde616c3783cf166afe5347eaf1fa2276c4e4e 100644
--- a/Source/core/workers/WorkerThread.h
+++ b/Source/core/workers/WorkerThread.h
@@ -99,11 +99,6 @@ public:
     enum WaitMode { WaitForMessage, DontWaitForMessage };
     MessageQueueWaitResult runDebuggerTask(WaitMode = WaitForMessage);
 
-    // These methods should be called if the holder of the thread is
-    // going to call runDebuggerTask in a loop.
-    void willEnterNestedLoop();
-    void didLeaveNestedLoop();
-
     WorkerGlobalScope* workerGlobalScope() const { return m_workerGlobalScope.get(); }
     bool terminated();