Revert of Add Autofill to webview

Revert of Add Autofill to webview (patchset #5 id:160001 of https://codereview.chromium.org/866523002/)

Reason for revert:
BUG=456215
Original issue's description:
> Add Autofill to webview
>
> The change in the chrome_autofill_client.cc is needed to enable the autofill popup on
> Mac.
>
> BUG=447938
> TEST=Start Chrome. Navigate to chrome://chrome-signin. Enter a correct username
> with an incorrect password. After the password error appears, you should be able
> to autofill that username.
>
> Committed: https://crrev.com/4a1e13b16b5ef2cb6f7c800ad3c08f1f44bef285
> Cr-Commit-Position: refs/heads/master@{#314889}

TBR=estade@chromium.org,fsamuel@chromium.org,lazyboy@chromium.org,noms@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=447938
Committed: https://crrev.com/a5b2fc98fd625f082bf00758571f476c7ae67dc4
Cr-Commit-Position: refs/heads/master@{#315122}

[Vitaly Buka (NO REVIEWS), 2015-02-06 22:28:39]

Created Revert of Add Autofill to webview

[commit-bot: I haz the power, 2015-02-06 22:29:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/887003007/1

[Vitaly Buka (NO REVIEWS), 2015-02-06 22:30:01]

vitalybuka@chromium.org changed reviewers:
+ amineer@chromium.org

[commit-bot: I haz the power, 2015-02-06 22:30:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-06 22:31:24]

Patchset 1 (id:??) landed as
https://crrev.com/a5b2fc98fd625f082bf00758571f476c7ae67dc4
Cr-Commit-Position: refs/heads/master@{#315122}