GitLab

This CL removes the Mojo Lite externs generators and compiles all WebUIs
with the for-compile targets instead.

Structurally, all Mojo types are now Closure record typedefs, and their
generated business logic is underneath a Spec object to prevent the name
collisions that were happening in the original implementation.

All goog.requires have also been dropped, and goog.provides are now
per interface/struct/enum.

This CL paves the way for generating single file Closure compiled blobs
that have all the Mojo bindings for a single WebUI.

TBR=kinuko@chromium.org

Bug: 914149
Change-Id: I8866fa9eaa707b2db42369e695ed0a51c373c6b6
Reviewed-on: https://chromium-review.googlesource.com/c/1476886
Commit-Queue: calamity <calamity@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Cr-Commit-Position: refs/heads/master@{#634527}