Make BluetoothAdapterBlueZ::Init early out if shutdown

device/bluetooth/bluez/bluetooth_adapter_bluez.cc

 // Copyright 2013 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/bluetooth/bluez/bluetooth_adapter_bluez.h"
 
 #include <memory>
 #include <set>
 #include <string>
 #include <utility>
@@ skipping 190 matching lines @@
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE, base::Bind(&BluetoothAdapterBlueZ::Init,
                               weak_ptr_factory_.GetWeakPtr()));
     return;
   }
   bluez::BluezDBusManager::Get()->CallWhenObjectManagerSupportIsKnown(
       base::Bind(&BluetoothAdapterBlueZ::Init, weak_ptr_factory_.GetWeakPtr()));
 }
 
 void BluetoothAdapterBlueZ::Init() {
-  // If the platform doesn't support Object Manager then Bluez 5 is probably
-  // not present. In this case we just return without initializing anything.
-  if (!bluez::BluezDBusManager::Get()->IsObjectManagerSupported()) {
+  // We may have been shutdown already, in which case do nothing. If the
+  // platform doesn't support Object Manager then Bluez 5 is probably not
+  // present. In this case we just return without initializing anything.
+  if (dbus_is_shutdown_ ||
+      !bluez::BluezDBusManager::Get()->IsObjectManagerSupported()) {
     initialized_ = true;
     init_callback_.Run();
     return;
   }
 
   bluez::BluezDBusManager::Get()->GetBluetoothAdapterClient()->AddObserver(
       this);
   bluez::BluezDBusManager::Get()->GetBluetoothDeviceClient()->AddObserver(this);
   bluez::BluezDBusManager::Get()->GetBluetoothInputClient()->AddObserver(this);
 
@@ skipping 1461 matching lines @@
   } else if (error_name == bluetooth_adapter::kErrorAlreadyExists) {
     code = BluetoothServiceRecordBlueZ::ErrorCode::ERROR_RECORD_ALREADY_EXISTS;
   } else if (error_name == bluetooth_adapter::kErrorNotReady) {
     code = BluetoothServiceRecordBlueZ::ErrorCode::ERROR_ADAPTER_NOT_READY;
   }
 
   error_callback.Run(code);
 }
 
 }  // namespace bluez