[Files app] ES6 class for cws_webview_client.js

Bug: 778674
Change-Id: I8ff9e8fcbdf264ce026db1d8579bb3f797eb98a5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1558551
Auto-Submit: Luciano Pacheco <lucmult@chromium.org>
Reviewed-by: Alex Danilo <adanilo@chromium.org>
Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/master@{#649014}
1 file changed