Revert of Change focus status according to the change of window focus

Revert of Change focus status according to the change of window focus (patchset #5 id:80001 of https://codereview.chromium.org/1164033002/)

Reason for revert:
This CL caused http://crbug.com/498631.

Original issue's description:
> Change focus status according to the change of window focus
>
> On Android, View's focus status isn't changed when window focus is lost.
> So we should update ContentViewCore's focus status according to the
> change of window focus.
>
> BUG=495547
>
> Committed: https://crrev.com/98d5087ecd03ed36ec2e161102b71dad97a92b4c
> Cr-Commit-Position: refs/heads/master@{#333446}

TBR=jdduke@chromium.org,tedchoc@chromium.org,boliu@chromium.org,ajith.v@samsung.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=495547
Committed: https://crrev.com/aab0a28a16e614146aed8d5bc62d9784f13ff93c
Cr-Commit-Position: refs/heads/master@{#333784}

[Jaekyun Seok (inactive), 2015-06-10 20:18:02]

Created Revert of Change focus status according to the change of window focus

[commit-bot: I haz the power, 2015-06-10 20:18:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1177483003/1

[commit-bot: I haz the power, 2015-06-10 20:19:39]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-10 20:20:37]

Patchset 1 (id:??) landed as
https://crrev.com/aab0a28a16e614146aed8d5bc62d9784f13ff93c
Cr-Commit-Position: refs/heads/master@{#333784}