Add Bluetooth device type icons on the device list in system tray.

ash/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/system/tray/system_tray_delegate.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) {
-}
+    : device_type(ash::BluetoothDeviceInfo::DEVICE_UNKNOWN),
+      connected(false),
+      connecting(false),
+      paired(false) {}
+
+BluetoothDeviceInfo::BluetoothDeviceInfo(const BluetoothDeviceInfo& other) =
+    default;
 
 BluetoothDeviceInfo::~BluetoothDeviceInfo() {
 }
 
 IMEInfo::IMEInfo() : selected(false), third_party(false) {
 }
 
 IMEInfo::IMEInfo(const IMEInfo& other) = default;
 
 IMEInfo::~IMEInfo() {
@@ skipping 247 matching lines @@
 
 void SystemTrayDelegate::ShouldRebootOnShutdown(
     const RebootOnShutdownCallback& callback) {
 }
 
 VPNDelegate* SystemTrayDelegate::GetVPNDelegate() const {
   return nullptr;
 }
 
 }  // namespace ash