Remove page_ordinal from AppListSpecifics.

Remove page_ordinal from AppListSpecifics.

This CL deprecates a field from a sync proto because it was not being used and isn't part of the model.

BUG=372264
Committed: https://crrev.com/0e83c8a1b0a5d5cadc57360c682f29f68fd42cc3
Cr-Commit-Position: refs/heads/master@{#298583}

[calamity, 2014-09-30 05:42:04]

calamity@chromium.org changed reviewers:
+ mgiuca@chromium.org

[Matt Giuca, 2014-09-30 05:59:16]

lgtm

You could add a bit more to the CL description explaining why this is being
removed (that not only was it not being used, but that pages are not, and never
have been, part of the app list model).

[calamity, 2014-10-03 02:54:55]

The CQ bit was checked by calamity@chromium.org

[commit-bot: I haz the power, 2014-10-03 02:55:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/597873002/1

[commit-bot: I haz the power, 2014-10-03 03:02:52]

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

[commit-bot: I haz the power, 2014-10-03 03:02:53]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[calamity, 2014-10-03 03:56:11]

calamity@chromium.org changed reviewers:
+ zea@chromium.org

[calamity, 2014-10-03 03:56:12]

+zea for sync/ OWNERS

[Nicolas Zea, 2014-10-03 17:54:08]

lgtm

[calamity, 2014-10-07 21:54:02]

The CQ bit was checked by calamity@chromium.org

[commit-bot: I haz the power, 2014-10-07 21:55:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/597873002/1

[commit-bot: I haz the power, 2014-10-07 22:01:17]

Committed patchset #1 (id:1) as 2bd7d53c3c0869f832b8165cae699fde4158e5b5

[commit-bot: I haz the power, 2014-10-07 22:02:24]

Patchset 1 (id:??) landed as
https://crrev.com/0e83c8a1b0a5d5cadc57360c682f29f68fd42cc3
Cr-Commit-Position: refs/heads/master@{#298583}