Include wx headers using quotes, not angle brackets. Wrap over long lines. Don't put space between the function name and its arguments. Make wxJSStringRef::ToWxString() itself, not its return value, const. Improve comments.
This is a squashed commit of the SOC2017_WEBVIEW_JS branch from https://github.com/joseeloren/wxWidgets.git Closes https://github.com/wxWidgets/wxWidgets/pull/538