Add bluetooth device type icons on MD system tray.

ash/common/system/tray/system_tray_delegate.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/tray/system_tray_delegate.h"
 
 #include "ash/common/system/tray/ime_info.h"
 #include "ash/common/system/tray/system_tray_item.h"
 
 namespace ash {
 
 NetworkIconInfo::NetworkIconInfo()
     : connecting(false),
       connected(false),
       tray_icon_visible(true),
       is_cellular(false) {}
 
 NetworkIconInfo::~NetworkIconInfo() {}
 
 BluetoothDeviceInfo::BluetoothDeviceInfo()
     : connected(false), connecting(false), paired(false) {}
 
+BluetoothDeviceInfo::BluetoothDeviceInfo(const BluetoothDeviceInfo& other) =
+    default;
+
 BluetoothDeviceInfo::~BluetoothDeviceInfo() {}
 
 UpdateInfo::UpdateInfo()
     : severity(UPDATE_NONE),
       update_required(false),
       factory_reset_required(false) {}
 
 UpdateInfo::~UpdateInfo() {}
 
 SystemTrayDelegate::SystemTrayDelegate() {}
@@ skipping 157 matching lines @@
 VPNDelegate* SystemTrayDelegate::GetVPNDelegate() const {
   return nullptr;
 }
 
 std::unique_ptr<SystemTrayItem> SystemTrayDelegate::CreateRotationLockTrayItem(
     SystemTray* tray) {
   return nullptr;
 }
 
 }  // namespace ash