bluetooth: Shutdown BluetoothAdapter before DBus on ChromeOS.

device/bluetooth/bluetooth_adapter.h

Index: device/bluetooth/bluetooth_adapter.h
diff --git a/device/bluetooth/bluetooth_adapter.h b/device/bluetooth/bluetooth_adapter.h
index 5184f2953a09bb018f56dc7192422b1156571e89..6e3f7eaea28938ee2f251934f69deccefb342064 100644
--- a/device/bluetooth/bluetooth_adapter.h
+++ b/device/bluetooth/bluetooth_adapter.h
@@ -188,6 +188,12 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothAdapter
   static base::WeakPtr<BluetoothAdapter> CreateAdapter(
       const InitCallback& init_callback);
 
+#if defined(OS_CHROMEOS)
+  // Shutdown the adapter, ending reliance DBusThreadManager, and resulting in
+  // the adapter's |IsPresent| returning false.
+  virtual void OnDBusThreadManagerShutdown();

[stevenjb, 2015/01/14 23:44:14]

nit: We could make this a pure virtual and eliminate the need for a
NOTIMPLEMENTED method in the .cc file (and, ensure that it gets implemented on a
chromeos build).

[scheib, 2015/01/15 00:03:40]

Acknowledged.

+#endif

[armansito, 2015/01/14 23:49:47]

I wouldn't even add this method to BluetoothAdapter. You can just directly
static_cast the adapter to BluetoothAdapterChromeOS and call its shutdown method
from BluetoothAdapterFactory.

[scheib, 2015/01/15 00:03:40]

Done.

+
   // Returns a weak pointer to an existing adapter for testing purposes only.
   base::WeakPtr<BluetoothAdapter> GetWeakPtrForTesting();