Revert of [V8] Use previous token location as EOS token location

Revert of [V8] Use previous token location as EOS token location (patchset #2 id:20001 of https://codereview.chromium.org/1100993003/)

Reason for revert:
[Sheriff] Speculative revert. This seems to block the current roll:
https://codereview.chromium.org/1124463003/

This bisect also points at this CL:
https://codereview.chromium.org/1124523002/

Please prepare the chromium side tests before a reland.

Original issue's description:
> [V8] Use previous token location as EOS token location
>
> EOS token location is useless for users and messages.js are not ready for its location.
> With this CL we use location of token before EOS for it.
>
> LOG=Y
> BUG=chromium:480652
> R=yurys@chromium.org,yangguo@chromium.org
>
> Committed: https://crrev.com/81afc9313ce84350bcba9f84b255a77e97cd3726
> Cr-Commit-Position: refs/heads/master@{#28164}

TBR=yangguo@chromium.org,yurys@chromium.org,kozyatinskiy@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:480652
Committed: https://crrev.com/8e3d776dcb5dfa75b1bc24b199465fb814bb4a0c
Cr-Commit-Position: refs/heads/master@{#28187}

[Michael Achenbach, 2015-05-03 12:47:36]

Created Revert of [V8] Use previous token location as EOS token location

[commit-bot: I haz the power, 2015-05-03 12:47:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1116233004/1

[commit-bot: I haz the power, 2015-05-03 12:47:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-03 12:48:08]

Patchset 1 (id:??) landed as
https://crrev.com/8e3d776dcb5dfa75b1bc24b199465fb814bb4a0c
Cr-Commit-Position: refs/heads/master@{#28187}