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

ash/system/tray/system_tray_delegate.h

Index: ash/system/tray/system_tray_delegate.h
diff --git a/ash/system/tray/system_tray_delegate.h b/ash/system/tray/system_tray_delegate.h
index 285dafb8c7e4787d58d1b7e72af8a2f3339b65a2..2251099477201dc6c55a26ba7d7faec164b2b46f 100644
--- a/ash/system/tray/system_tray_delegate.h
+++ b/ash/system/tray/system_tray_delegate.h
@@ -47,11 +47,30 @@ struct ASH_EXPORT NetworkIconInfo {
 };
 
 struct ASH_EXPORT BluetoothDeviceInfo {
+  enum DeviceType {
+    DEVICE_UNKNOWN,
+    DEVICE_COMPUTER,
+    DEVICE_PHONE,
+    DEVICE_MODEM,
+    DEVICE_AUDIO,
+    DEVICE_CAR_AUDIO,
+    DEVICE_VIDEO,
+    DEVICE_PERIPHERAL,
+    DEVICE_JOYSTICK,
+    DEVICE_GAMEPAD,
+    DEVICE_KEYBOARD,
+    DEVICE_MOUSE,
+    DEVICE_TABLET,
+    DEVICE_KEYBOARD_MOUSE_COMBO,
+  };
+
   BluetoothDeviceInfo();
+  BluetoothDeviceInfo(const BluetoothDeviceInfo& other);
   ~BluetoothDeviceInfo();
 
   std::string address;
   base::string16 display_name;
+  DeviceType device_type;
   bool connected;
   bool connecting;
   bool paired;