Enable some remote LTH tests in layer_tree_host_unittests.

cc/test/layer_tree_host_remote_for_testing.h

Index: cc/test/layer_tree_host_remote_for_testing.h
diff --git a/cc/test/layer_tree_host_remote_for_testing.h b/cc/test/layer_tree_host_remote_for_testing.h
index 14389b98740598683ad5c202d9631320542b4d64..2af67222c216ce9103ace73e0dd51907661702ee 100644
--- a/cc/test/layer_tree_host_remote_for_testing.h
+++ b/cc/test/layer_tree_host_remote_for_testing.h
@@ -94,12 +94,10 @@ class LayerTreeHostRemoteForTesting : public LayerTreeHostRemote,
   void RemoteHostNeedsMainFrame();
   void ProcessRemoteCompositorUpdate(
       std::unique_ptr<CompositorProtoState> compositor_proto_state);
-  void UpdateStateOnInProcessHost();
 
   std::unique_ptr<LayerTreeHostInProcess> layer_tree_host_in_process_;
   std::unique_ptr<CompositorStateDeserializer> compositor_state_deserializer_;
 
-  std::unique_ptr<CompositorProtoState> pending_compositor_proto_state_;
   ScrollOffsetMap layers_scrolled_;
 
   std::unique_ptr<LayerTreeHostInProcessClient>