Chrome Version: 64.0.3271.0
OS: Windows

The ui::Accelerator system in Chromium was built when keys were identified by Windows-style virtual KeyboardCodes.  DOM now provides |code| and |key| values, with well-defined meanings, which would be more suitable to use to express accelerators.  e.g. Accelerators distinguish Alt from AltGraph based on the modifiers set on the events, whereas using |key| the two can be distinguished directly.