Sync: Remove VerifyLocalIdToUpdate

Sync: Remove VerifyLocalIdToUpdate.

Now that 362467 is fixed, VerifyLocalIdToUpdate function is no
longer needed and should be removed. This function was added two
months ago to help diagnose the root cause.

I've verified that there are no new crash dumps with
VerifyLocalIdToUpdate since 44.0.2401.0.

BUG=362467
Committed: https://crrev.com/c51d1eb924fd2580a44eb24614295f080f8b4bee
Cr-Commit-Position: refs/heads/master@{#330455}

[stanisc, 2015-05-18 22:36:48]

stanisc@chromium.org changed reviewers:
+ maniscalco@chromium.org

[stanisc, 2015-05-18 22:38:48]

PTAL. This is cleanup change to complete 362467.

[maniscalco, 2015-05-18 23:37:09]

lgtm

[stanisc, 2015-05-19 00:03:57]

The CQ bit was checked by stanisc@chromium.org

[commit-bot: I haz the power, 2015-05-19 00:05:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1145453004/1

[commit-bot: I haz the power, 2015-05-19 00:09:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-19 00:10:40]

Patchset 1 (id:??) landed as
https://crrev.com/c51d1eb924fd2580a44eb24614295f080f8b4bee
Cr-Commit-Position: refs/heads/master@{#330455}