[web] Fix duplicate dep, strengthen provisioning.

[web] Fix duplicate dep, strengthen provisioning.

Remove the unnecessary "es6-promise" polyfill from "package.json". This
became unnecessary when TypeScript was instructed to build with ES6.

Update "web.py" to purge existing Node/Bower directories when their deps
change, rather than just ensure them. We do this because we don't want
residual packages from previous specifications to still be importable.

BUG=chromium:731519
TEST=local
  - Reproduced the failure in the bug.
  - Works with this patch.

Review-Url: https://codereview.chromium.org/2935473002
Committed: https://github.com/luci/luci-go/commit/e65d27b76fb791d6ee6e47c510fa9aa398557f2f

[dnj, 2017-06-09 15:00:14]

dnj@chromium.org changed reviewers:
+ dnj@chromium.org, dsansome@chromium.org, hinoka@chromium.org

[dnj, 2017-06-09 15:00:15]

PTAL

[dnj, 2017-06-09 15:00:19]

The CQ bit was checked by dnj@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-06-09 15:00:28]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-06-09 15:05:57]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-06-09 15:05:58]

Dry run: This issue passed the CQ dry run.

[Ryan Tseng, 2017-06-09 17:23:33]

hinoka@google.com changed reviewers:
+ hinoka@google.com

[Ryan Tseng, 2017-06-09 17:23:33]

lgtm

[dnj, 2017-06-09 17:24:31]

The CQ bit was checked by dnj@chromium.org

[commit-bot: I haz the power, 2017-06-09 17:24:33]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-06-09 17:29:54]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1497029071402320, "parent_rev":
"61e8b0d41951da9c4833c8b597c8f07e129b625b", "commit_rev":
"e65d27b76fb791d6ee6e47c510fa9aa398557f2f"}

[commit-bot: I haz the power, 2017-06-09 17:29:56]

Description was changed from

==========
[web] Fix duplicate dep, strengthen provisioning.

Remove the unnecessary "es6-promise" polyfill from "package.json". This
became unnecessary when TypeScript was instructed to build with ES6.

Update "web.py" to purge existing Node/Bower directories when their deps
change, rather than just ensure them. We do this because we don't want
residual packages from previous specifications to still be importable.

BUG=chromium:731519
TEST=local
  - Reproduced the failure in the bug.
  - Works with this patch.
==========

to

==========
[web] Fix duplicate dep, strengthen provisioning.

Remove the unnecessary "es6-promise" polyfill from "package.json". This
became unnecessary when TypeScript was instructed to build with ES6.

Update "web.py" to purge existing Node/Bower directories when their deps
change, rather than just ensure them. We do this because we don't want
residual packages from previous specifications to still be importable.

BUG=chromium:731519
TEST=local
  - Reproduced the failure in the bug.
  - Works with this patch.

Review-Url: https://codereview.chromium.org/2935473002
Committed:
https://github.com/luci/luci-go/commit/e65d27b76fb791d6ee6e47c510fa9aa398557f2f
==========

[commit-bot: I haz the power, 2017-06-09 17:29:57]

Committed patchset #1 (id:1) as
https://github.com/luci/luci-go/commit/e65d27b76fb791d6ee6e47c510fa9aa398557f2f