bluetooth: Shutdown BluetoothAdapter before DBus on ChromeOS.

device/bluetooth/bluetooth_adapter.h

 // 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.
 
 #ifndef DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 174 matching lines @@
   // asynchronous initialization is complete.
   // Caution: The returned pointer also transfers ownership of the adapter.  The
   // caller is expected to call |AddRef()| on the returned pointer, typically by
   // storing it into a |scoped_refptr|.
   static base::WeakPtr<BluetoothAdapter> CreateAdapter(
       const InitCallback& init_callback);
 
   // Returns a weak pointer to an existing adapter for testing purposes only.
   base::WeakPtr<BluetoothAdapter> GetWeakPtrForTesting();
 
+#if defined(OS_CHROMEOS)
+  // Shutdown the adapter: tear down and clean up all objects owned by
+  // BluetoothAdapter. After this call, the BluetoothAdapter will behave as if
+  // no Bluetooth controller exists in the local system. |IsPresent| will return
+  // false. No futher use of DBusThreadManager will be made.
+  void OnDBusThreadManagerShutdown();

[armansito, 2015/01/16 21:57:18]

If we're going to have this in BluetoothAdapter, then just call it Shutdown,
with no mention for Chrome OS or D-Bus. It doesn't have to do anything for the
other platforms, just say that this shutdowns and invalidates a
BluetoothAdapter.

[scheib, 2015/01/16 22:28:27]

Done.

+#endif
+
   // Adds and removes observers for events on this bluetooth adapter. If
   // monitoring multiple adapters, check the |adapter| parameter of observer
   // methods to determine which adapter is issuing the event.
   virtual void AddObserver(BluetoothAdapter::Observer* observer) = 0;
   virtual void RemoveObserver(
       BluetoothAdapter::Observer* observer) = 0;
 
   // The address of this adapter. The address format is "XX:XX:XX:XX:XX:XX",
   // where each XX is a hexadecimal number.
   virtual std::string GetAddress() const = 0;
@@ skipping 238 matching lines @@
 // Trait for RefCountedThreadSafe that deletes BluetoothAdapter.
 struct BluetoothAdapterDeleter {
   static void Destruct(const BluetoothAdapter* adapter) {
     adapter->DeleteOnCorrectThread();
   }
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_H_