Show device connection and paired status in chooser on Mac

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 188 matching lines @@
 WebBluetoothServiceImpl::~WebBluetoothServiceImpl() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   ClearState();
 }
 
 void WebBluetoothServiceImpl::SetClientConnectionErrorHandler(
     base::Closure closure) {
   binding_.set_connection_error_handler(closure);
 }
 
+bool WebBluetoothServiceImpl::IsDevicePaired(
+    const std::string& device_address) {
+  return allowed_devices_map_.GetDeviceId(GetOrigin(), device_address) !=
+         nullptr;
+}
+
 void WebBluetoothServiceImpl::DidFinishNavigation(
     NavigationHandle* navigation_handle) {
   if (navigation_handle->HasCommitted() &&
       navigation_handle->GetRenderFrameHost() == render_frame_host_ &&
       !navigation_handle->IsSamePage()) {
     ClearState();
   }
 }
 
 void WebBluetoothServiceImpl::AdapterPoweredChanged(
@@ skipping 776 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