Remove done notifications from incoming message handlers.

remoting/protocol/host_control_dispatcher.h

Index: remoting/protocol/host_control_dispatcher.h
diff --git a/remoting/protocol/host_control_dispatcher.h b/remoting/protocol/host_control_dispatcher.h
index 50cdf6e85a3f479f0b80cbb7c0ebe82d10e03f89..d863f6432ce4a12d9510e735bbe48db07aaf8111 100644
--- a/remoting/protocol/host_control_dispatcher.h
+++ b/remoting/protocol/host_control_dispatcher.h
@@ -55,8 +55,7 @@ class HostControlDispatcher : public ChannelDispatcherBase,
   void set_host_stub(HostStub* host_stub) { host_stub_ = host_stub; }
 
  private:
-  void OnMessageReceived(scoped_ptr<ControlMessage> message,
-                         const base::Closure& done_task);
+  void OnMessageReceived(scoped_ptr<ControlMessage> message);
 
   ClipboardStub* clipboard_stub_;
   HostStub* host_stub_;