[extensions] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

Replace MessageLoopProxy usage with ThreadTaskRunnerHandle in 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/7b7ceb183957fc55735153fbacb73a012a69b2cf
Cr-Commit-Position: refs/heads/master@{#328313}

[Pranay, 2015-05-04 06:34:45]

PTAL

Thanks

[Pranay, 2015-05-04 06:41:09]

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

[Pranay, 2015-05-04 06:41:09]

PTAL 

Thanks

[Ken Rockot(use gerrit already), 2015-05-04 18:19:58]

lgtm

https://codereview.chromium.org/1120793007/diff/1/extensions/browser/sandboxe...
File extensions/browser/sandboxed_unpacker_unittest.cc (right):

https://codereview.chromium.org/1120793007/diff/1/extensions/browser/sandboxe...
extensions/browser/sandboxed_unpacker_unittest.cc:9: #include
"base/message_loop/message_loop.h"
is this header still needed?

https://codereview.chromium.org/1120793007/diff/1/extensions/common/one_shot_...
File extensions/common/one_shot_event.h (left):

https://codereview.chromium.org/1120793007/diff/1/extensions/common/one_shot_...
extensions/common/one_shot_event.h:67: //
This should not be deleted. Maybe change to "Omitting the |runner| argument
indicates that |task| should run on the current thread's TaskRunner."

[Pranay, 2015-05-05 03:07:58]

https://codereview.chromium.org/1120793007/diff/1/extensions/browser/sandboxe...
File extensions/browser/sandboxed_unpacker_unittest.cc (right):

https://codereview.chromium.org/1120793007/diff/1/extensions/browser/sandboxe...
extensions/browser/sandboxed_unpacker_unittest.cc:9: #include
"base/message_loop/message_loop.h"
Not needed, got confused with MessageLoopRunner :)

https://codereview.chromium.org/1120793007/diff/1/extensions/common/one_shot_...
File extensions/common/one_shot_event.h (left):

https://codereview.chromium.org/1120793007/diff/1/extensions/common/one_shot_...
extensions/common/one_shot_event.h:67: //
On 2015/05/04 18:19:58, Ken Rockot wrote:
> This should not be deleted. Maybe change to "Omitting the |runner| argument
> indicates that |task| should run on the current thread's TaskRunner."

Done.

[Pranay, 2015-05-05 03:08:17]

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

[Pranay, 2015-05-05 03:08:18]

The patchset sent to the CQ was uploaded after l-g-t-m from rockot@chromium.org
Link to the patchset: https://codereview.chromium.org/1120793007/#ps20001
(title: "Fixed Review Comments")

[commit-bot: I haz the power, 2015-05-05 03:08:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1120793007/20001

[commit-bot: I haz the power, 2015-05-05 03:22:34]

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

[commit-bot: I haz the power, 2015-05-05 03:22:35]

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

[Pranay, 2015-05-05 10:49:20]

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

[Pranay, 2015-05-05 10:49:21]

The patchset sent to the CQ was uploaded after l-g-t-m from rockot@chromium.org
Link to the patchset: https://codereview.chromium.org/1120793007/#ps60001
(title: "Fixed Dependency over component module by removing file")

[commit-bot: I haz the power, 2015-05-05 10:49:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1120793007/60001

[Pranay, 2015-05-05 10:50:23]

Done

[commit-bot: I haz the power, 2015-05-05 12:13:00]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2015-05-05 12:13:57]

Patchset 4 (id:??) landed as
https://crrev.com/7b7ceb183957fc55735153fbacb73a012a69b2cf
Cr-Commit-Position: refs/heads/master@{#328313}