Revert of Moves SQLitePersistentCookieStore to net/extras/sqlite.

Revert of Moves SQLitePersistentCookieStore to net/extras/sqlite. (patchset #25 id:470001 of https://codereview.chromium.org/1016643004/)

Reason for revert:
Seems to break content_unittests QuotaPolicyCookieStoreTest.TestPolicy. See https://build.chromium.org/p/chromium.webrtc/builders/Win7%20Tester for details.

Reverting to see if the bot turns green again. I am unable to find any other CL that can cause this.

Original issue's description:
> Moves SQLitePersistentCookieStore to net/extras/sqlite.
>
> The application of special storage policy is split out into a new class,
> QuotaPolicyCookieStore, in content/browser/net.
>
> BUG=467596
> TEST=No visible impact.
>
> Committed: https://crrev.com/57adf29fb4e46a49272610140b097f85e1e805f5
> Cr-Commit-Position: refs/heads/master@{#329950}

TBR=rsleevi@chromium.org,mef@chromium.org,nharper@chromium.org,avi@chromium.org,rohitrao@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=467596
Committed: https://crrev.com/ac4f49641d2b1246fdcfdb35993b21200d43460f
Cr-Commit-Position: refs/heads/master@{#330075}

[henrika (OOO until Aug 14), 2015-05-15 11:12:27]

Created Revert of Moves SQLitePersistentCookieStore to net/extras/sqlite.

[commit-bot: I haz the power, 2015-05-15 11:12:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1134113007/1

[commit-bot: I haz the power, 2015-05-15 11:13:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-15 11:14:17]

Patchset 1 (id:??) landed as
https://crrev.com/ac4f49641d2b1246fdcfdb35993b21200d43460f
Cr-Commit-Position: refs/heads/master@{#330075}