Revert of Enable libc++ on Android

Revert of Enable libc++ on Android (patchset #16 id:460001 of https://codereview.chromium.org/835633003/)

Reason for revert:
Slows down the slowest bot on CQ by 20 minutes.

BUG=456396
Original issue's description:
> Enable libc++ on Android
>
> Switch Chrome on Android to use libc++ instead of stlport. WebView AOSP
> builds will continue to use stlport for the time being.
>
> Note that this change is exploratory, and likely to be reverted before
> branch point (ensuring WebView and Chrome remain in lockstep with
> respect to standard library dependencies).
>
> BUG=427718
> TBR=cpu@chromium.org
>
> Committed: https://crrev.com/8681920fa22ded465054301ce96657a4ddaf2a04
> Cr-Commit-Position: refs/heads/master@{#315085}

TBR=fdegans@chromium.org,pasko@chromium.org,jamesr@chromium.org,thakis@chromium.org,boliu@chromium.org,davidben@chromium.org,cpu@chromium.org,piman@chromium.org,jdduke@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=427718
Committed: https://crrev.com/f43ab9ce5b48ed622736d96c9fba9e8fa57858a3
Cr-Commit-Position: refs/heads/master@{#315174}

[jam, 2015-02-07 03:26:00]

Created Revert of Enable libc++ on Android

[commit-bot: I haz the power, 2015-02-07 03:26:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/903323002/1

[commit-bot: I haz the power, 2015-02-07 03:27:13]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-07 03:27:57]

Patchset 1 (id:??) landed as
https://crrev.com/f43ab9ce5b48ed622736d96c9fba9e8fa57858a3
Cr-Commit-Position: refs/heads/master@{#315174}

[jdduke (slow), 2015-02-24 16:17:17]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/951983002/ by jdduke@chromium.org.

The reason for reverting is: Android CQ test recipe has switched to release +
dcheck_always_on,
solving the CQ execution time regression..