Add a path for content/ to open and control a Bluetooth chooser dialog.

content/browser/bluetooth/first_device_bluetooth_chooser.h

+// Copyright 2015 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 CONTENT_BROWSER_BLUETOOTH_FIRST_DEVICE_BLUETOOTH_CHOOSER_H_
+#define CONTENT_BROWSER_BLUETOOTH_FIRST_DEVICE_BLUETOOTH_CHOOSER_H_
+
+#include "content/public/browser/bluetooth_chooser.h"
+
+namespace content {
+
+// Implements a Bluetooth chooser that, instead of showing a dialog, selects the
+// first added device, or cancels if no device is added before discovery stops.
+// This is used as a default chooser implementation for platforms without a full
+// UI.
+class FirstDeviceBluetoothChooser : public BluetoothChooser {
+ public:
+  // See the BluetoothChooser::EventHandler comments for how |event_handler| is
+  // used.
+  FirstDeviceBluetoothChooser(const EventHandler& event_handler);

[Alexei Svitkine (slow), 2015/08/25 20:59:23]

explicit

[Jeffrey Yasskin, 2015/08/25 21:04:49]

Done.

+  ~FirstDeviceBluetoothChooser() override;
+
+  // BluetoothChooser implementation:

[Alexei Svitkine (slow), 2015/08/25 20:59:23]

Nit: For new code, I think the convention is just:

// BluetoothChooser:

[Jeffrey Yasskin, 2015/08/25 21:04:49]

Done.

+  void SetAdapterPresence(AdapterPresence presence) override;
+  void ShowDiscoveryState(DiscoveryState state) override;
+  void AddDevice(const std::string& device_id,
+                 const base::string16& device_name) override;
+  void RemoveDevice(const std::string& device_id) override {}
+
+ private:
+  EventHandler event_handler_;
+};

[Alexei Svitkine (slow), 2015/08/25 20:59:23]

DISALLOW_COPY_AND_ASSIGN()?

[Jeffrey Yasskin, 2015/08/25 21:04:49]

Done.

+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_BLUETOOTH_FIRST_DEVICE_BLUETOOTH_CHOOSER_H_