Fix DCHECK(!config_watcher_) in HostProcess::~HostProcess().

remoting/host/remoting_me2me_host.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.
 //
 // This file implements a standalone host process for Me2Me.
 
 #include <string>
 
 #include "base/at_exit.h"
 #include "base/bind.h"
@@ skipping 1429 matching lines @@
   host_change_notification_listener_.reset();
 
   if (state_ == HOST_STOPPING_TO_RESTART) {
     StartHost();
   } else if (state_ == HOST_STOPPING) {
     state_ = HOST_STOPPED;
 
     shutdown_watchdog_->SetExitCode(*exit_code_out_);
     shutdown_watchdog_->Arm();
 
+    config_watcher_.reset();
+
     if (policy_watcher_.get()) {
       policy_watcher_->StopWatching(
           base::Bind(&HostProcess::OnPolicyWatcherShutdown, this));
     } else {
       OnPolicyWatcherShutdown();
     }
   } else {
     // This method is only called in STOPPING_TO_RESTART and STOPPING states.
     NOTREACHED();
   }
@@ skipping 54 matching lines @@
       base::TimeDelta::FromSeconds(kShutdownTimeoutSeconds));
   new HostProcess(context.Pass(), &exit_code, &shutdown_watchdog);
 
   // Run the main (also UI) message loop until the host no longer needs it.
   message_loop.Run();
 
   return exit_code;
 }
 
 }  // namespace remoting