Added image pattern comparison logic for test interface and fixture.

remoting/test/app_remoting_connected_client_fixture.cc

 // Copyright 2015 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 "remoting/test/app_remoting_connected_client_fixture.h"
 
 #include "base/json/json_reader.h"
 #include "base/logging.h"
 #include "base/run_loop.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 69 matching lines @@
   message.set_type(message_request_title);
   message.set_data(message_payload);
   connection_helper_->host_stub()->DeliverClientMessage(message);
 
   DCHECK(!timer_->IsRunning());
   timer_->Start(FROM_HERE, max_wait_time, run_loop_->QuitClosure());
 
   run_loop_->Run();
   timer_->Stop();
 
-  connection_helper_->ResetHostMessageReceivedCallback();
   return message_received;
 }
 
 }  // namespace test
 }  // namespace remoting