cros: Clean up TrayBluetoothHelper todos

ash/common/system/chromeos/bluetooth/tray_bluetooth.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 ASH_COMMON_SYSTEM_CHROMEOS_BLUETOOTH_TRAY_BLUETOOTH_H_
 #define ASH_COMMON_SYSTEM_CHROMEOS_BLUETOOTH_TRAY_BLUETOOTH_H_
 
 #include "ash/common/system/chromeos/bluetooth/bluetooth_observer.h"
 #include "ash/common/system/tray/system_tray_item.h"
 #include "base/macros.h"
 
 namespace ash {
 namespace tray {
 class BluetoothDefaultView;
 class BluetoothDetailedView;
 }
 
+// Bluetooth section in the main system tray menu. Contains:
+// * Toggle to turn Bluetooth on and off
+// * Gear icon that takes the user to the web ui settings
+// * List of paired devices
+// * List of unpaired devices
 class TrayBluetooth : public SystemTrayItem, public BluetoothObserver {
  public:
   explicit TrayBluetooth(SystemTray* system_tray);
   ~TrayBluetooth() override;
 
  private:
   // Overridden from SystemTrayItem.
   views::View* CreateTrayView(LoginStatus status) override;
   views::View* CreateDefaultView(LoginStatus status) override;
   views::View* CreateDetailedView(LoginStatus status) override;
   void DestroyTrayView() override;
   void DestroyDefaultView() override;
   void DestroyDetailedView() override;
   void UpdateAfterLoginStatusChange(LoginStatus status) override;
 
   // Overridden from BluetoothObserver.
   void OnBluetoothRefresh() override;
   void OnBluetoothDiscoveringChanged() override;
 
   tray::BluetoothDefaultView* default_;
   tray::BluetoothDetailedView* detailed_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayBluetooth);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_CHROMEOS_BLUETOOTH_TRAY_BLUETOOTH_H_