Fix code dup in volume_manager_common.js.

Fix code dup in volume_manager_common.js.

BUG=none

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=269479

[mtomasz, 2014-05-08 02:50:53]

WOW! This must have happened during crazy rebasing when files moved from
chrome/browser/resources/file_manager to chrome/ui/file_manager.

LGTM. Thanks!

[kinaba, 2014-05-08 02:57:18]

The CQ bit was checked by kinaba@chromium.org

[commit-bot: I haz the power, 2014-05-08 03:00:10]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/kinaba@chromium.org/278553002/1

[commit-bot: I haz the power, 2014-05-08 14:20:00]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)

[commit-bot: I haz the power, 2014-05-08 18:39:52]

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

[commit-bot: I haz the power, 2014-05-08 18:39:52]

Try jobs failed on following builders:
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)

[kinaba, 2014-05-09 00:00:55]

The CQ bit was checked by kinaba@chromium.org

[commit-bot: I haz the power, 2014-05-09 00:09:23]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/kinaba@chromium.org/278553002/1

[commit-bot: I haz the power, 2014-05-09 04:32:45]

FYI, CQ is re-trying this CL (attempt #1).
Please consider checking whether the failures are real,
and report flakes to chrome-troopers@google.com.
The failing builders are:
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)

[commit-bot: I haz the power, 2014-05-09 06:21:41]

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

[commit-bot: I haz the power, 2014-05-09 06:21:41]

Try jobs failed on following builders:
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)

[kinaba, 2014-05-09 06:27:27]

The CQ bit was checked by kinaba@chromium.org

[commit-bot: I haz the power, 2014-05-09 06:29:51]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/kinaba@chromium.org/278553002/1

[commit-bot: I haz the power, 2014-05-10 02:00:59]

Change committed as 269479