bluetooth: Make public BluetoothDevice::GetName method.

device/bluetooth/bluetooth_task_manager_win.h

Index: device/bluetooth/bluetooth_task_manager_win.h
diff --git a/device/bluetooth/bluetooth_task_manager_win.h b/device/bluetooth/bluetooth_task_manager_win.h
index f05be4d73ec79f2a57bd18091fba9ccbbb05ef1d..cf31f8474c7e5448d19867726f905d9ff2ef9f99 100644
--- a/device/bluetooth/bluetooth_task_manager_win.h
+++ b/device/bluetooth/bluetooth_task_manager_win.h
@@ -16,6 +16,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
 #include "base/observer_list.h"
+#include "base/optional.h"
 #include "base/win/scoped_handle.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 #include "device/bluetooth/bluetooth_export.h"
@@ -74,7 +75,7 @@ class DEVICE_BLUETOOTH_EXPORT BluetoothTaskManagerWin
 
     // Properties common to Bluetooth Classic and LE devices.
     std::string address;  // This uniquely identifies the device.
-    std::string name;     // Friendly name
+    base::Optional<std::string> name;  // Friendly name
     bool visible;
     bool connected;
     bool authenticated;