Make Reflector Use Main Thread MessageLoop when in SingleThread

content/browser/compositor/reflector_impl.cc

Index: content/browser/compositor/reflector_impl.cc
diff --git a/content/browser/compositor/reflector_impl.cc b/content/browser/compositor/reflector_impl.cc
index c2d19b136f07f14b9117810858f2cdae70873108..10b549b31e77ba75bb3e6628a753df405fb284f6 100644
--- a/content/browser/compositor/reflector_impl.cc
+++ b/content/browser/compositor/reflector_impl.cc
@@ -21,12 +21,16 @@ ReflectorImpl::ReflectorImpl(
     int surface_id)
     : impl_unsafe_(output_surface_map),
       main_unsafe_(mirrored_compositor, mirroring_layer),
-      impl_message_loop_(compositor_thread_loop),
       main_message_loop_(base::MessageLoopProxy::current()),
       surface_id_(surface_id) {
   GLHelper* helper = ImageTransportFactory::GetInstance()->GetGLHelper();
   MainThreadData& main = GetMain();
   main.mailbox = new OwnedMailbox(helper);
+  if (!compositor_thread_loop) {
+    impl_message_loop_ = main_message_loop_;
+  } else {
+    impl_message_loop_ = compositor_thread_loop;
+  }
   impl_message_loop_->PostTask(
       FROM_HERE,
       base::Bind(