Add file thread in MessageHostContext.

remoting/host/host_mock_objects.cc

 // Copyright (c) 2012 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/host/host_mock_objects.h"
 
 #include "base/message_loop_proxy.h"
 #include "net/base/ip_endpoint.h"
 #include "remoting/proto/event.pb.h"
 #include "remoting/protocol/transport.h"
@@ skipping 34 matching lines @@
 
 MockLocalInputMonitor::MockLocalInputMonitor() {}
 
 MockLocalInputMonitor::~MockLocalInputMonitor() {}
 
 scoped_ptr<LocalInputMonitor> LocalInputMonitor::Create() {
   return scoped_ptr<LocalInputMonitor>(new MockLocalInputMonitor());
 }
 
 MockChromotingHostContext::MockChromotingHostContext()
-    : ChromotingHostContext(NULL, base::MessageLoopProxy::current()) {
+    : ChromotingHostContext(base::MessageLoopProxy::current()) {
 }
 
 MockChromotingHostContext::~MockChromotingHostContext() {}
 
 MockClientSessionEventHandler::MockClientSessionEventHandler() {}
 
 MockClientSessionEventHandler::~MockClientSessionEventHandler() {}
 
 MockUserAuthenticator::MockUserAuthenticator() {}
 
 MockUserAuthenticator::~MockUserAuthenticator() {}
 
 }  // namespace remoting