Refactor ChannelAuthenticator so that it can be used with Authenticator.

remoting/protocol/jingle_session_unittest.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/bind.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/message_loop_proxy.h"
 #include "base/path_service.h"
 #include "base/time.h"
@@ skipping 221 matching lines @@
                     OnStateChange(Session::CLOSED))
             .Times(1);
       } else {
         // Might pass through the CONNECTED state.
         EXPECT_CALL(host_connection_callback_,
                     OnStateChange(Session::CONNECTED))
             .Times(AtMost(1));
         EXPECT_CALL(host_connection_callback_,
                     OnStateChange(Session::CONNECTED_CHANNELS))
             .Times(AtMost(1));
-        // Expect that the connection will be closed eventually.
+        // Expect that the connection will fail.
         EXPECT_CALL(host_connection_callback_,
                     OnStateChange(Session::FAILED))
             .Times(1)
             .WillOnce(InvokeWithoutArgs(&QuitCurrentThread));
       }
     }
 
     {
       InSequence dummy;
 
@@ skipping 535 matching lines @@
   ASSERT_TRUE(tester->WaitFinished());
   LOG(INFO) << "Time for 500k bytes "
             << tester->GetElapsedTime().InMilliseconds() << " ms.";
 
   // Connections must be closed while |tester| still exists.
   CloseSessions();
 }
 
 }  // namespace protocol
 }  // namespace remoting