[Extensions Toolbar] Component extensions default to the front of the toolbar

[Extensions Toolbar] Component extensions default to the front of the toolbar

New component extensions should default to the front of the visible icons. The
user can still reposition them, but for the first startup, they will now appear
at the beginning.

BUG=463938
Committed: https://crrev.com/4e4200b5a7c35ff8478766426572ea3c6b3fa57f
Cr-Commit-Position: refs/heads/master@{#319747}

[Devlin, 2015-03-05 19:23:28]

rdevlin.cronin@chromium.org changed reviewers:
+ finnur@chromium.org

[Devlin, 2015-03-05 19:23:28]

Finnur, mind taking a look?

[Finnur, 2015-03-06 14:34:31]

LGTM

[Devlin, 2015-03-07 06:50:49]

The CQ bit was checked by rdevlin.cronin@chromium.org

[commit-bot: I haz the power, 2015-03-07 06:52:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/981603002/1

[commit-bot: I haz the power, 2015-03-07 08:52:37]

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

[commit-bot: I haz the power, 2015-03-07 08:52:38]

Try jobs failed on following builders:
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build
URL)
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build URL)
Timed out jobs are not retried to avoid causing additional load on the builders
with large pending queues.

[Devlin, 2015-03-07 16:39:23]

The CQ bit was checked by rdevlin.cronin@chromium.org

[commit-bot: I haz the power, 2015-03-07 16:40:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/981603002/1

[commit-bot: I haz the power, 2015-03-07 18:42:03]

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

[commit-bot: I haz the power, 2015-03-07 18:42:04]

Try jobs failed on following builders:
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build
URL)
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build URL)
Timed out jobs are not retried to avoid causing additional load on the builders
with large pending queues.

[Devlin, 2015-03-09 05:03:02]

The CQ bit was checked by rdevlin.cronin@chromium.org

[commit-bot: I haz the power, 2015-03-09 05:03:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/981603002/1

[commit-bot: I haz the power, 2015-03-09 05:52:37]

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

[commit-bot: I haz the power, 2015-03-09 05:52:39]

Failed to apply the patch.

[commit-bot: I haz the power, 2015-03-09 05:52:46]

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

[Devlin, 2015-03-09 18:00:29]

The CQ bit was checked by rdevlin.cronin@chromium.org

[Devlin, 2015-03-09 18:00:29]

The patchset sent to the CQ was uploaded after l-g-t-m from finnur@chromium.org
Link to the patchset: https://codereview.chromium.org/981603002/#ps20001 (title:
"Latest master")

[commit-bot: I haz the power, 2015-03-09 18:02:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/981603002/20001

[commit-bot: I haz the power, 2015-03-09 19:11:05]

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

[commit-bot: I haz the power, 2015-03-09 19:11:07]

Failed to apply the patch.

[Devlin, 2015-03-09 22:11:53]

The CQ bit was checked by rdevlin.cronin@chromium.org

[commit-bot: I haz the power, 2015-03-09 22:12:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/981603002/20001

[commit-bot: I haz the power, 2015-03-09 22:13:50]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-03-09 22:15:51]

Patchset 2 (id:??) landed as
https://crrev.com/4e4200b5a7c35ff8478766426572ea3c6b3fa57f
Cr-Commit-Position: refs/heads/master@{#319747}