media: Quit MojoMediaApplication when no service is bound.

device/devices_app/devices_app.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 "device/devices_app/devices_app.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/sequenced_task_runner.h"
@@ skipping 134 matching lines @@
   // Owned by its message pipe.
   usb::DeviceManagerImpl* device_manager = new usb::DeviceManagerImpl(
       request.Pass(), delegate.Pass(), service_task_runner_);
   device_manager->set_error_handler(this);
 
   active_device_manager_count_++;
   idle_timeout_callback_.Cancel();
 }
 
 void DevicesApp::OnConnectionError() {
-  DCHECK_GE(active_device_manager_count_, 0u);
+  DCHECK_GT(active_device_manager_count_, 0u);
   active_device_manager_count_--;
   if (active_device_manager_count_ == 0) {
     // If the last DeviceManager connection has been dropped, kick off an idle
     // timeout to shut ourselves down.
     StartIdleTimer();
   }
 }
 
 void DevicesApp::StartIdleTimer() {
   // Passing unretained |app_impl_| is safe here because |app_impl_| is
   // guaranteed to outlive |this|, and the callback is canceled if |this| is
   // destroyed.
   idle_timeout_callback_.Reset(base::Bind(&mojo::ApplicationImpl::Terminate,
                                           base::Unretained(app_impl_)));
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE, idle_timeout_callback_.callback(),
       base::TimeDelta::FromSeconds(kIdleTimeoutInSeconds));
 }
 
 }  // namespace device