cros: Clean up TrayBluetoothHelper todos

ash/common/system/chromeos/bluetooth/tray_bluetooth.cc

 // 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.
 
 #include "ash/common/system/chromeos/bluetooth/tray_bluetooth.h"
 
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/system/chromeos/bluetooth/tray_bluetooth_helper.h"
 #include "ash/common/system/tray/hover_highlight_view.h"
 #include "ash/common/system/tray/system_tray.h"
@@ skipping 144 matching lines @@
     SetImage(gfx::CreateVectorIcon(GetCurrentIcon(), style->GetIconColor()));
   }
 
  private:
   const gfx::VectorIcon& GetCurrentIcon() {
     TrayBluetoothHelper* helper = Shell::Get()->tray_bluetooth_helper();
     if (!helper->GetBluetoothEnabled())
       return kSystemMenuBluetoothDisabledIcon;
 
     bool has_connected_device = false;
-    BluetoothDeviceList list;
-    helper->GetAvailableBluetoothDevices(&list);
+    BluetoothDeviceList list = helper->GetAvailableBluetoothDevices();
     for (size_t i = 0; i < list.size(); ++i) {
       if (list[i].connected) {
         has_connected_device = true;
         break;
       }
     }
     return has_connected_device ? kSystemMenuBluetoothConnectedIcon
                                 : kSystemMenuBluetoothIcon;
   }
 
@@ skipping 50 matching lines @@
       HideLoadingIndicator();
     }
   }
 
   void UpdateBluetoothDeviceList() {
     std::set<std::string> new_connecting_devices;
     std::set<std::string> new_connected_devices;
     std::set<std::string> new_paired_not_connected_devices;
     std::set<std::string> new_discovered_not_paired_devices;
 
-    BluetoothDeviceList list;
-    Shell::Get()->tray_bluetooth_helper()->GetAvailableBluetoothDevices(&list);
+    BluetoothDeviceList list =
+        Shell::Get()->tray_bluetooth_helper()->GetAvailableBluetoothDevices();
     for (size_t i = 0; i < list.size(); ++i) {
       if (list[i].connecting) {
         new_connecting_devices.insert(list[i].address);
         UpdateBluetoothDeviceListHelper(&connecting_devices_, list[i]);
       } else if (list[i].connected && list[i].paired) {
         new_connected_devices.insert(list[i].address);
         UpdateBluetoothDeviceListHelper(&connected_devices_, list[i]);
       } else if (list[i].paired) {
         new_paired_not_connected_devices.insert(list[i].address);
         UpdateBluetoothDeviceListHelper(&paired_not_connected_devices_,
@@ skipping 398 matching lines @@
     detailed_->Update();
 }
 
 void TrayBluetooth::OnBluetoothDiscoveringChanged() {
   if (!detailed_)
     return;
   detailed_->Update();
 }
 
 }  // namespace ash