Implement bluetooth chooser for Chrome Apps on Mac

extensions/browser/ui/extension_bluetooth_chooser.h

+// 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.
+
+#ifndef EXTENSIONS_BROWSER_UI_EXTENSION_BLUETOOTH_CHOOSER_H_
+#define EXTENSIONS_BROWSER_UI_EXTENSION_BLUETOOTH_CHOOSER_H_
+
+#include <stddef.h>
+
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "base/macros.h"
+#include "base/strings/string16.h"
+#include "components/ui/chooser_controller/chooser_controller.h"
+#include "content/public/browser/bluetooth_chooser.h"
+
+namespace content {
+class RenderFrameHost;
+}
+
+namespace extensions {
+
+class ExtensionChooserDialog;
+
+// Represents a Bluetooth chooser to ask the user to select a Bluetooth
+// device from a list of options. This implementation is for extensions.
+class ExtensionBluetoothChooser : public content::BluetoothChooser,
+                                  public ChooserController {
+ public:
+  ExtensionBluetoothChooser(
+      content::RenderFrameHost* frame,
+      const content::BluetoothChooser::EventHandler& event_handler);
+  ~ExtensionBluetoothChooser() override;
+
+  // BluetoothChooser:
+  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;
+
+  // ChooserController:
+  size_t NumOptions() const override;
+  const base::string16& GetOption(size_t index) const override;
+  void Select(size_t index) override;
+  void Cancel() override;
+  void Close() override;
+  GURL GetHelpCenterUrl() const override;
+  void OpenHelpCenterUrl() const override;
+
+ private:
+  Observer* observer_ = nullptr;
+  content::BluetoothChooser::EventHandler event_handler_;
+  // Each pair is a (device name, device id).
+  std::vector<std::pair<base::string16, std::string>> device_names_and_ids_;
+  std::unique_ptr<ExtensionChooserDialog> dialog_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionBluetoothChooser);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_UI_EXTENSION_BLUETOOTH_CHOOSER_H_