[chrome/browser/chromeos/extensions] Deprecation of loop proxy usage with TTRH

Replace MessageLoopProxy usage with ThreadTaskRunnerHandle in chrome/browser/chromeos/extensions module.

MessageLoopProxy is deprecated.
This basically does a search and replace of:

MessageLoopProxy::current() -> ThreadTaskRunnerHandle::Get().

MessageLoopProxy -> SingleThreadTaskRunner

BUG=391045
Committed: https://crrev.com/686f1bbfc1c12432a07d584180d5320a3f096b86
Cr-Commit-Position: refs/heads/master@{#328700}

[Pranay, 2015-05-05 06:43:45]

pranay.kumar@samsung.com changed reviewers:
+ bshe@chromium.org

[Pranay, 2015-05-05 06:43:45]

PTAL

Thanks

[bshe, 2015-05-05 13:24:04]

Removing myself as reviewer as I am not familiar with file manager related work.
Anyone in chrome/browser/chromeos/extensions/file_manager/OWNERS should be able
to review your change better than I am.

[Pranay, 2015-05-05 14:34:41]

pranay.kumar@samsung.com changed reviewers:
- bshe@chromium.org

[Pranay, 2015-05-05 14:39:26]

pranay.kumar@samsung.com changed reviewers:
+ benwells@chromium.org

[Pranay, 2015-05-05 14:39:27]

PTAL

Thanks

[benwells, 2015-05-05 20:35:51]

On 2015/05/05 14:39:27, Pranay wrote:
> PTAL
> 
> Thanks

Can you run the try jobs?

[Pranay, 2015-05-06 02:46:02]

Hi Benwell,

Not as of now but I have requested access for the same.

[benwells, 2015-05-06 03:16:11]

The CQ bit was checked by benwells@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-05-06 03:16:32]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1118943005/1

[commit-bot: I haz the power, 2015-05-06 03:49:46]

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

[commit-bot: I haz the power, 2015-05-06 03:49:47]

Dry run: This issue passed the CQ dry run.

[benwells, 2015-05-07 00:05:26]

lgtm with the nit fixed.

https://codereview.chromium.org/1118943005/diff/1/chrome/browser/chromeos/ext...
File
chrome/browser/chromeos/extensions/device_local_account_external_policy_loader_unittest.cc
(right):

https://codereview.chromium.org/1118943005/diff/1/chrome/browser/chromeos/ext...
chrome/browser/chromeos/extensions/device_local_account_external_policy_loader_unittest.cc:15:
#include "base/single_thread_task_runner.h"
Nit: this include isn't needed.

[Pranay, 2015-05-07 03:16:50]

Fixed nit

https://codereview.chromium.org/1118943005/diff/1/chrome/browser/chromeos/ext...
File
chrome/browser/chromeos/extensions/device_local_account_external_policy_loader_unittest.cc
(right):

https://codereview.chromium.org/1118943005/diff/1/chrome/browser/chromeos/ext...
chrome/browser/chromeos/extensions/device_local_account_external_policy_loader_unittest.cc:15:
#include "base/single_thread_task_runner.h"
On 2015/05/07 00:05:26, benwells wrote:
> Nit: this include isn't needed.

Done.

[Pranay, 2015-05-07 03:17:23]

Thanks for the review :)

Pranay

[Pranay, 2015-05-07 03:17:30]

The CQ bit was checked by pranay.kumar@samsung.com

[Pranay, 2015-05-07 03:17:31]

The patchset sent to the CQ was uploaded after l-g-t-m from
benwells@chromium.org
Link to the patchset: https://codereview.chromium.org/1118943005/#ps20001
(title: "Fixed Review nit")

[commit-bot: I haz the power, 2015-05-07 03:18:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1118943005/20001

[commit-bot: I haz the power, 2015-05-07 03:52:22]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-05-07 03:53:15]

Patchset 2 (id:??) landed as
https://crrev.com/686f1bbfc1c12432a07d584180d5320a3f096b86
Cr-Commit-Position: refs/heads/master@{#328700}