Enable theme-color on Chrome tabbed mode for phones by default.

Enable theme-color on Chrome tabbed mode for phones by default.

- Remove about:flags enable-theme-color-in-tabbed-mode
- Enable theme-color for tabbed mode for phones for all channels.

BUG=482207
Committed: https://crrev.com/151479f43c58255e210c1d0f730ebf979ea360f6
Cr-Commit-Position: refs/heads/master@{#359430}

[aurimas (slooooooooow), 2015-11-11 23:49:50]

aurimas@chromium.org changed reviewers:
+ yusufo@chromium.org

[aurimas (slooooooooow), 2015-11-11 23:49:50]

PTAL. This is in preparation to enable theme-color after chrome-launch-review
gives us a GO.

[aurimas (slooooooooow), 2015-11-12 18:41:19]

Launch approved.

[aurimas (slooooooooow), 2015-11-12 21:12:31]

aurimas@chromium.org changed reviewers:
+ dfalcantara@chromium.org

[aurimas (slooooooooow), 2015-11-12 21:12:32]

dfalcantara PTAL

[gone, 2015-11-12 21:27:14]

lgtm

[aurimas (slooooooooow), 2015-11-12 21:53:07]

The CQ bit was checked by aurimas@chromium.org

[aurimas (slooooooooow), 2015-11-12 21:53:11]

The CQ bit was unchecked by aurimas@chromium.org

[aurimas (slooooooooow), 2015-11-12 22:39:32]

The CQ bit was checked by aurimas@chromium.org

[aurimas (slooooooooow), 2015-11-12 22:39:32]

The patchset sent to the CQ was uploaded after l-g-t-m from
dfalcantara@chromium.org
Link to the patchset: https://chromiumcodereview.appspot.com/1434123002/#ps40001
(title: "Rebase")

[commit-bot: I haz the power, 2015-11-12 22:40:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1434123002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1434123002/40001

[commit-bot: I haz the power, 2015-11-12 23:23:17]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-11-12 23:24:13]

Patchset 3 (id:??) landed as
https://crrev.com/151479f43c58255e210c1d0f730ebf979ea360f6
Cr-Commit-Position: refs/heads/master@{#359430}