Revert "Ship the Credential Management API by default" from M50.

Revert "Ship the Credential Management API by default" from M50.

This reverts commit 062c94e083bb1a2ec9df0222cdbdff6b364cb466, which should
have landed only after the M50 branch point.

> Ship the Credential Management API by default
>
> This patch enables the Credential Management API by default.
>
> It also converts the existing CLI flag into a `base::Feature`, which will allow
> us to hook it up to Finch as a kill-switch in case it asplodes the internets.
> This feature flag can be removed after ~a release, once we're confident that
> we're not breaking things.
>
> Intent to Ship: https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/7ouLjWzcjb0
>
> BUG=576705
> R=vabr@chromium.org
>
> Committed: https://crrev.com/062c94e083bb1a2ec9df0222cdbdff6b364cb466
> Cr-Commit-Position: refs/heads/master@{#377276}

BUG=601130
TBR=vabr@chromium.org

Committed: https://chromium.googlesource.com/chromium/src/+/f2176c7a2a03c5dbd4f98f3fd90c2a4f9dd20948

[Mike West, 2016-04-08 07:18:50]

Description was changed from

==========
Revert "Ship the Credential Management API by default" from M50.

This reverts commit 062c94e083bb1a2ec9df0222cdbdff6b364cb466, which should
have landed only after the M50 branch point.

> Ship the Credential Management API by default
>
> This patch enables the Credential Management API by default.
>
> It also converts the existing CLI flag into a `base::Feature`, which will
allow
> us to hook it up to Finch as a kill-switch in case it asplodes the internets.
> This feature flag can be removed after ~a release, once we're confident that
> we're not breaking things.
>
> Intent to Ship:
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/7ouLjWzcjb0
>
> BUG=576705
> R=vabr@chromium.org
>
> Committed: https://crrev.com/062c94e083bb1a2ec9df0222cdbdff6b364cb466
> Cr-Commit-Position: refs/heads/master@{#377276}

BUG=601130
TBR=vabr@chromium.org
==========

to

==========
Revert "Ship the Credential Management API by default" from M50.

This reverts commit 062c94e083bb1a2ec9df0222cdbdff6b364cb466, which should
have landed only after the M50 branch point.

> Ship the Credential Management API by default
>
> This patch enables the Credential Management API by default.
>
> It also converts the existing CLI flag into a `base::Feature`, which will
allow
> us to hook it up to Finch as a kill-switch in case it asplodes the internets.
> This feature flag can be removed after ~a release, once we're confident that
> we're not breaking things.
>
> Intent to Ship:
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/7ouLjWzcjb0
>
> BUG=576705
> R=vabr@chromium.org
>
> Committed: https://crrev.com/062c94e083bb1a2ec9df0222cdbdff6b364cb466
> Cr-Commit-Position: refs/heads/master@{#377276}

BUG=601130
TBR=vabr@chromium.org

Committed:
https://chromium.googlesource.com/chromium/src/+/f2176c7a2a03c5dbd4f98f3fd90c...
==========

[Mike West, 2016-04-08 07:18:52]

Committed patchset #1 (id:1) manually as
f2176c7a2a03c5dbd4f98f3fd90c2a4f9dd20948.