Revert of Reland of 'Optimize trivial regexp disjunctions' CL 1176453002

Revert of Reland of 'Optimize trivial regexp disjunctions' CL 1176453002 (patchset #2 id:20001 of https://codereview.chromium.org/1174713002/)

Reason for revert:
Tree looks like a Christmas tree and this isn't helping

Original issue's description:
> Reland of 'Optimize trivial regexp disjunctions' CL 1176453002
>
> Original code review: https://codereview.chromium.org/1176453002/
>
> TBR=yangguo@chromium.org
> BUG=chromium:482998
> LOG=n
>
> Committed: https://crrev.com/85fab0fa092e8d979413f6a61baec3abe26e568d
> Cr-Commit-Position: refs/heads/master@{#28884}

TBR=yangguo@chromium.org,erikcorry@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:482998
Committed: https://crrev.com/9b8a56d4335ac5e591c6da5fe4354a4c49734031
Cr-Commit-Position: refs/heads/master@{#28885}

[erikcorry, 2015-06-09 23:06:11]

Created Revert of Reland of 'Optimize trivial regexp disjunctions' CL 1176453002

[commit-bot: I haz the power, 2015-06-09 23:06:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1172893002/1

[commit-bot: I haz the power, 2015-06-09 23:06:38]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-06-09 23:06:38]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[Erik Corry Chromium.org, 2015-06-09 23:08:26]

The CQ bit was checked by erikcorry@chromium.org

[commit-bot: I haz the power, 2015-06-09 23:08:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1172893002/1

[commit-bot: I haz the power, 2015-06-09 23:08:58]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-06-09 23:08:59]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[Erik Corry Chromium.org, 2015-06-09 23:09:14]

lgtm

[Erik Corry Chromium.org, 2015-06-09 23:09:26]

The CQ bit was checked by erikcorry@chromium.org

[commit-bot: I haz the power, 2015-06-09 23:09:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1172893002/1

[commit-bot: I haz the power, 2015-06-09 23:10:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-09 23:10:30]

Patchset 1 (id:??) landed as
https://crrev.com/9b8a56d4335ac5e591c6da5fe4354a4c49734031
Cr-Commit-Position: refs/heads/master@{#28885}