GitLab

Splits the contents of example.py into interface.py and
several files.

blink_v8_bridge.py will support Blink-V8 type and value
conversions.

codegen_utils.py is currently a collection of misc util
functions, and should be better organized later.

Bug: 839389
Change-Id: I609be076533106e4e98865add162f40f965398dd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1892974Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712554}