bluetooth: Web Bluetooth can filter by empty device names, doesn't leak MACs.

content/browser/bluetooth/web_bluetooth_service_impl.cc

 // Copyright 2016 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.
 
 // ID Not In Map Note:
 // A service, characteristic, or descriptor ID not in the corresponding
 // WebBluetoothServiceImpl map [service_id_to_device_address_,
 // characteristic_id_to_service_id_, descriptor_to_characteristic_] implies a
 // hostile renderer because a renderer obtains the corresponding ID from this
 // class and it will be added to the map at that time.
@@ skipping 765 matching lines @@
       VLOG(1) << "\t Allowed: " << uuid.canonical_value();
       filtered_uuids.push_back(uuid.canonical_value());
     } else {
       VLOG(1) << "\t Not Allowed: " << uuid.canonical_value();
     }
   }
 
   blink::mojom::WebBluetoothDevicePtr device_ptr =
       blink::mojom::WebBluetoothDevice::New();
   device_ptr->id = device_id_for_origin;
-  // TODO(615720): Use the upcoming GetName (was GetDeviceName).
-  device_ptr->name = base::UTF16ToUTF8(device->GetNameForDisplay());
+  device_ptr->name = device->GetName() ? mojo::String(device->GetName().value())
+                                       : mojo::String(nullptr);
   device_ptr->uuids = std::move(filtered_uuids);
 
   RecordRequestDeviceOutcome(UMARequestDeviceOutcome::SUCCESS);
   callback.Run(blink::mojom::WebBluetoothError::SUCCESS, std::move(device_ptr));
 }
 
 void WebBluetoothServiceImpl::OnGetDeviceFailed(
     const RequestDeviceCallback& callback,
     blink::mojom::WebBluetoothError error) {
   // Errors are recorded by the *device_chooser_controller_.
@@ skipping 192 matching lines @@
   characteristic_id_to_service_id_.clear();
   service_id_to_device_address_.clear();
   connected_devices_.reset(
       new FrameConnectedBluetoothDevices(render_frame_host_));
   allowed_devices_map_ = BluetoothAllowedDevicesMap();
   device_chooser_controller_.reset();
   BluetoothAdapterFactoryWrapper::Get().ReleaseAdapter(this);
 }
 
 }  // namespace content