This CL identifies dependencies between modules
and convert existing javascript files to ES6
standard modules.

It cleans the unused code and remove duplicate
code throughout the app.

Bug: v8:10670

Change-Id: I787de8ca0d76c56aec5aeb3faa94a9e158a94c72
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2292237
Commit-Queue: Zeynep Cankara <zcankara@google.com>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Sathya Gunasekaran  <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68847}