Revert of Move status bar color setting to ChromeActivity.

Revert of Move status bar color setting to ChromeActivity. (patchset #5 id:70001 of https://codereview.chromium.org/1364043003/ )

Reason for revert:
Broke CustomTabActivityTest#testToolbarColor, see crbug.com/536698 for the tracking bug, and crrev.com/1370003002 for a potential fix.

Original issue's description:
> Move status bar color setting to ChromeActivity.
>
> BUG=535235
>
> Committed: https://crrev.com/4b74179f72ea6c4f0b1539a8c31277e8d29f7711
> Cr-Commit-Position: refs/heads/master@{#350961}

TBR=yusufo@chromium.org,tedchoc@chromium.org,aurimas@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=535235
Committed: https://crrev.com/c219d1def47875bf0569c7f931620e6c9f94a801
Cr-Commit-Position: refs/heads/master@{#351042}

[Benoit L, 2015-09-28 09:11:55]

Created Revert of Move status bar color setting to ChromeActivity.

[commit-bot: I haz the power, 2015-09-28 09:12:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1372883002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1372883002/1

[commit-bot: I haz the power, 2015-09-28 09:13:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-28 09:14:13]

Patchset 1 (id:??) landed as
https://crrev.com/c219d1def47875bf0569c7f931620e6c9f94a801
Cr-Commit-Position: refs/heads/master@{#351042}