cc:: Add remote mode to the compositor

cc/trees/remote_proto_channel.h

Index: cc/trees/remote_proto_channel.h
diff --git a/cc/trees/remote_proto_channel.h b/cc/trees/remote_proto_channel.h
index b0f1647e281a8f96e0cf77636a41c62d5267581e..7cad6c1fda4fe449b4ee58bfad8ab919de363d1f 100644
--- a/cc/trees/remote_proto_channel.h
+++ b/cc/trees/remote_proto_channel.h
@@ -21,6 +21,8 @@ class RemoteProtoChannel {
   // incoming protobufs.
   class ProtoReceiver {
    public:
+    // TODO(khushalsagar): This should probably include a closure that returns

[David Trainor- moved to gerrit, 2015/12/11 17:13:44]

We could influence channel throttling with that which might be nice.

[Khushal, 2015/12/11 22:49:37]

Yup. We could avoid blocking the main thread on the client with this approach
for initialization and commits, because the network layer will buffer the protos
till they are acked.

+    // the status of processing this proto.
     virtual void OnProtoReceived(
         scoped_ptr<proto::CompositorMessage> proto) = 0;