Adding ThreadTaskRunnerHandle in lieu of MessageLoopProxy in net/cert and net/cookies module

Adding ThreadTaskRunnerHandle in lieu of MessageLoopProxy in net/cert and net/cookies module

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

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

MessageLoopProxy -> SingleThreadTaskRunner

BUG=391045
Committed: https://crrev.com/afc451774403bb76323d40020dcb48ffd0306461
Cr-Commit-Position: refs/heads/master@{#329998}

[anujsharma, 2015-05-13 10:05:15]

anujk.sharma@samsung.com changed reviewers:
+ eroman@chromium.org

[anujsharma, 2015-05-13 10:05:15]

PTAL

[eroman, 2015-05-14 23:29:43]

lgtm

[anujsharma, 2015-05-14 23:56:20]

On 2015/05/14 23:29:43, eroman (sick slow) wrote:
> lgtm

Thanks eroman for lgtm.

[anujsharma, 2015-05-14 23:56:29]

The CQ bit was checked by anujk.sharma@samsung.com

[commit-bot: I haz the power, 2015-05-14 23:58:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1124153005/1

[commit-bot: I haz the power, 2015-05-15 00:50:43]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-15 00:51:26]

Patchset 1 (id:??) landed as
https://crrev.com/afc451774403bb76323d40020dcb48ffd0306461
Cr-Commit-Position: refs/heads/master@{#329998}