Revert of cc: Move worker context BindToCurrentThread/SetupLock calls out of cc::OutputSurface.

content/browser/android/in_process/synchronous_compositor_factory_impl.cc

Index: content/browser/android/in_process/synchronous_compositor_factory_impl.cc
diff --git a/content/browser/android/in_process/synchronous_compositor_factory_impl.cc b/content/browser/android/in_process/synchronous_compositor_factory_impl.cc
index 18c544cb9614cc5f9556f9211dc77e1a232aaf1d..220c86244f057387b9221809109de194188a0e69 100644
--- a/content/browser/android/in_process/synchronous_compositor_factory_impl.cc
+++ b/content/browser/android/in_process/synchronous_compositor_factory_impl.cc
@@ -173,14 +173,6 @@
       CreateContextProviderForCompositor(surface_id, RENDER_COMPOSITOR_CONTEXT);
   scoped_refptr<cc::ContextProvider> worker_context =
       CreateContextProviderForCompositor(0, RENDER_WORKER_CONTEXT);
-  if (!worker_context->BindToCurrentThread())
-    worker_context = nullptr;
-  if (worker_context) {
-    worker_context->SetupLock();
-    // Detach from thread to allow context to be destroyed on a
-    // different thread without being used.
-    worker_context->DetachFromThread();
-  }
 
   return make_scoped_ptr(new SynchronousCompositorOutputSurface(
       onscreen_context, worker_context, routing_id, frame_swap_message_queue));