Revert "Only store leading 13 bits of password hash."

Revert "Only store leading 13 bits of password hash."

This reverts commit c511691cc06fd3a92f27e688795872e61efff40a.

CL added SetUpgradeAndCheckCredentials test.
This test failed on Mac 10.6 build bot.

TBR=mlerman@chromium.org,
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=none

Committed: https://crrev.com/6bc9a331e82e4f94ca9e0f24eb0efa45ffc1e472
Cr-Commit-Position: refs/heads/master@{#314302}

[kozy, 2015-02-03 10:14:54]

kozyatinskiy@chromium.org changed reviewers:
+ mlerman@chromium.org
- mlerman@chrmoium.org

[kozy, 2015-02-03 10:15:04]

The CQ bit was checked by kozyatinskiy@chromium.org

[commit-bot: I haz the power, 2015-02-03 10:15:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/875983008/1

[commit-bot: I haz the power, 2015-02-03 10:17:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-03 10:18:21]

Patchset 1 (id:??) landed as
https://crrev.com/6bc9a331e82e4f94ca9e0f24eb0efa45ffc1e472
Cr-Commit-Position: refs/heads/master@{#314302}