bluetooth: Make public BluetoothDevice::GetName method.

device/bluetooth/bluetooth_task_manager_win.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_TASK_MANAGER_WIN_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_TASK_MANAGER_WIN_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #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"
 #include "device/bluetooth/bluetooth_low_energy_win.h"
 
 namespace base {
 
 class SequencedTaskRunner;
 class SequencedWorkerPool;
 
@@ skipping 38 matching lines @@
   };
 
   struct DEVICE_BLUETOOTH_EXPORT DeviceState {
     DeviceState();
     ~DeviceState();
 
     bool is_bluetooth_classic() const { return path.empty(); }
 
     // 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;
     ScopedVector<ServiceRecordState> service_record_states;
     // Properties specific to Bluetooth Classic devices.
     uint32_t bluetooth_class;
     // Properties specific to Bluetooth LE devices.
     base::FilePath path;
   };
 
@@ skipping 235 matching lines @@
   // Use for discarding too many log messages.
   base::TimeTicks current_logging_batch_ticks_;
   int current_logging_batch_count_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothTaskManagerWin);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_TASK_MANAGER_WIN_H_