Revert of Add a WorkerScheduler and a WebThreadImplForWorker

content/child/threaded_data_provider.h

Index: content/child/threaded_data_provider.h
diff --git a/content/child/threaded_data_provider.h b/content/child/threaded_data_provider.h
index effb4f9d0c55869b53f300f7407d7c101122a50f..9ac2ac21037debcb3612bd5053b6c564ca64f134 100644
--- a/content/child/threaded_data_provider.h
+++ b/content/child/threaded_data_provider.h
@@ -26,7 +26,7 @@
 
 namespace content {
 class ResourceDispatcher;
-class WebThreadImplForWorkerScheduler;
+class WebThreadImpl;
 
 class ThreadedDataProvider {
  public:
@@ -78,7 +78,7 @@
   int shm_size_;
   scoped_ptr<base::WeakPtrFactory<ThreadedDataProvider> >
       background_thread_weak_factory_;
-  WebThreadImplForWorkerScheduler& background_thread_;
+  WebThreadImpl& background_thread_;
   IPC::SyncChannel* ipc_channel_;
   blink::WebThreadedDataReceiver* threaded_data_receiver_;
   bool resource_filter_active_;