Revert of Limit form-less Autofilling to pages that look like checkout pages.

Revert of Limit form-less Autofilling to pages that look like checkout pages. (patchset #7 id:120001 of https://codereview.chromium.org/1081803003/)

Reason for revert:
Caused compile error on Win x64 GN bot

Original issue's description:
> Limit form-less Autofilling to pages that look like checkout pages.
>
> This should hopefully stem the tide of false positives on non-checkout pages, while preserving desired behavior on Best Buy and Apple checkout.
>
> Fixing FormStructureBrowserTests: I went back and added <form>s that were present in the source pages but not in the local copies. I also added the original <title> tags, except for ones that did /not/ include any of the checkout keywords. For these, I added the checkout keywords to the title, so that the test still had some value (instead of passing trivially because the title was "Google Calendar" and not something like "Payment information").
>
> BUG=471090, 477466
>
> Committed: https://crrev.com/aa3219ce27ef5471c19670fe5145b136925cbc89
> Cr-Commit-Position: refs/heads/master@{#327108}

TBR=thestig@chromium.org,brettw@chromium.org,estade@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=471090, 477466
Committed: https://crrev.com/f44602c3bbc05303167de26b707af9cd29f931e1
Cr-Commit-Position: refs/heads/master@{#327116}

[mohsen, 2015-04-27 21:02:06]

Created Revert of Limit form-less Autofilling to pages that look like checkout
pages.

[commit-bot: I haz the power, 2015-04-27 21:05:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1106313002/1

[commit-bot: I haz the power, 2015-04-27 21:08:25]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-27 21:09:22]

Patchset 1 (id:??) landed as
https://crrev.com/f44602c3bbc05303167de26b707af9cd29f931e1
Cr-Commit-Position: refs/heads/master@{#327116}