Make the pref_service in TestShellDelegate injectable.

Make the pref_service in TestShellDelegate injectable.

This lets tests interested in testing features related to the
prefs_services inject their own into TestShellDelegate and
register in it whatever prefs they want.

BUG=718472
Review-Url: https://codereview.chromium.org/2861873004
Cr-Commit-Position: refs/heads/master@{#469387}
Committed: https://chromium.googlesource.com/chromium/src/+/7093bce085613efd785b72f2a66ee8be27f7d6ed

[afakhry, 2017-05-04 17:15:18]

afakhry@chromium.org changed reviewers:
+ jamescook@chromium.org

[afakhry, 2017-05-04 17:15:18]

James, can you please review? Thank you!

[James Cook, 2017-05-04 17:28:44]

lgtm

[afakhry, 2017-05-04 17:35:30]

The CQ bit was checked by afakhry@chromium.org

[commit-bot: I haz the power, 2017-05-04 17:36:06]

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, 2017-05-04 18:22:27]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493919330689260, "parent_rev":
"47aabc548f0762b7f8ada3a20ac16d07a8b0e35c", "commit_rev":
"7093bce085613efd785b72f2a66ee8be27f7d6ed"}

[commit-bot: I haz the power, 2017-05-04 18:22:45]

Description was changed from

==========
Make the pref_service in TestShellDelegate injectable.

This lets tests interested in testing features related to the
prefs_services inject their own into TestShellDelegate and
register in it whatever prefs they want.

BUG=718472
==========

to

==========
Make the pref_service in TestShellDelegate injectable.

This lets tests interested in testing features related to the
prefs_services inject their own into TestShellDelegate and
register in it whatever prefs they want.

BUG=718472

Review-Url: https://codereview.chromium.org/2861873004
Cr-Commit-Position: refs/heads/master@{#469387}
Committed:
https://chromium.googlesource.com/chromium/src/+/7093bce085613efd785b72f2a66e...
==========

[commit-bot: I haz the power, 2017-05-04 18:22:48]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/7093bce085613efd785b72f2a66e...