Switch child threads so that current() only works on the correct thread and t...

chrome/worker/worker_thread.h

Index: chrome/worker/worker_thread.h
===================================================================
--- chrome/worker/worker_thread.h	(revision 18344)
+++ chrome/worker/worker_thread.h	(working copy)
@@ -17,9 +17,7 @@
   ~WorkerThread();
 
   // Returns the one worker thread.
-  static WorkerThread* current() {
-    return static_cast<WorkerThread*>(ChildThread::current());
-  }
+  static WorkerThread* current();
 
  private:
   virtual void OnControlMessageReceived(const IPC::Message& msg);