Switch remoting/protocol to new callbacks

remoting/protocol/client_stub.h

Index: remoting/protocol/client_stub.h
diff --git a/remoting/protocol/client_stub.h b/remoting/protocol/client_stub.h
index 21b3219a1745c84baed822664afe03adfa1f4fd6..49b6740fe3225a916b83c9b07d7a340242084718 100644
--- a/remoting/protocol/client_stub.h
+++ b/remoting/protocol/client_stub.h
@@ -11,8 +11,7 @@
 #define REMOTING_PROTOCOL_CLIENT_STUB_H_
 
 #include "base/basictypes.h"
-
-class Task;
+#include "base/callback.h"
 
 namespace remoting {
 namespace protocol {
@@ -26,7 +25,7 @@ class ClientStub {
   virtual ~ClientStub() {}
 
   virtual void BeginSessionResponse(const LocalLoginStatus* msg,
-                                    Task* done) = 0;
+                                    const base::Closure& done) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ClientStub);