Upstream Enhanced Bookmark Model (2nd Trial)

Upstream Enhanced Bookmark Model (2nd Land)

This is the data layer of enhanced bookmark. There is no reason why
this class should live in private repository.

BUG=428832
Previously landed in:
https://crrev.com/691b64f43fc0a69752344e5edbbc4d8f406cf261
Reverted in: https://crrev.com/f40cb64710a333da6d554e98dfcc432cd6cf8f1f

Committed: https://crrev.com/ec62d8d37848b12309994f10bf8457ae4fcabb8e
Cr-Commit-Position: refs/heads/master@{#316085}

[Ian Wen, 2015-02-12 19:19:58]

ianwen@chromium.org changed reviewers:
+ cjhopman@chromium.org, kkimlabs@chromium.org, newt@chromium.org

[Kibeom Kim (inactive), 2015-02-12 19:20:49]

lgtm

[cjhopman, 2015-02-12 19:28:39]

lgtm

[newt (away), 2015-02-12 19:30:23]

lgtm

[Ian Wen, 2015-02-12 19:31:15]

The CQ bit was checked by ianwen@chromium.org

[commit-bot: I haz the power, 2015-02-12 19:32:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/923653002/1

[commit-bot: I haz the power, 2015-02-12 20:46:06]

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

[commit-bot: I haz the power, 2015-02-12 20:46:07]

Try jobs failed on following builders:
  linux_chromium_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Ian Wen, 2015-02-12 23:34:51]

The CQ bit was checked by ianwen@chromium.org

[commit-bot: I haz the power, 2015-02-12 23:35:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/923653002/1

[commit-bot: I haz the power, 2015-02-12 23:36:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-12 23:37:31]

Patchset 1 (id:??) landed as
https://crrev.com/ec62d8d37848b12309994f10bf8457ae4fcabb8e
Cr-Commit-Position: refs/heads/master@{#316085}