Switch remoting/protocol to new callbacks

remoting/protocol/host_message_dispatcher.h

Index: remoting/protocol/host_message_dispatcher.h
diff --git a/remoting/protocol/host_message_dispatcher.h b/remoting/protocol/host_message_dispatcher.h
index 2a554745c0edd21b7458a3d8037775669dbc18be..0b95e4659fbd5c0d180160299fa1eadff01f2b90 100644
--- a/remoting/protocol/host_message_dispatcher.h
+++ b/remoting/protocol/host_message_dispatcher.h
@@ -48,11 +48,13 @@ class HostMessageDispatcher {
  private:
   // This method is called by |control_channel_reader_| when a control
   // message is received.
-  void OnControlMessageReceived(ControlMessage* message, Task* done_task);
+  void OnControlMessageReceived(ControlMessage* message,
+                                const base::Closure& done_task);
 
   // This method is called by |event_channel_reader_| when a event
   // message is received.
-  void OnEventMessageReceived(EventMessage* message, Task* done_task);
+  void OnEventMessageReceived(EventMessage* message,
+                              const base::Closure& done_task);
 
   // MessageReader that runs on the control channel. It runs a loop
   // that parses data on the channel and then delegates the message to this