Use ThreadTaskRunnerHandle::Get() in dbus.

Use ThreadTaskRunnerHandle::Get() in dbus.

Replace MessageLoop::current()->task_runner() with
ThreadTaskRunnerHandle::Get() in dbus.

Why?
 - The two are equivalent on threads that run a MessageLoop.
 - MessageLoop::current() doesn't work in base/task_scheduler
   because the scheduler's thread don't run MessageLoops.
   This CL will therefore facilitate the migration of browser
   threads to base/task_scheduler.

BUG=616447
Committed: https://crrev.com/af82da320b8ef3521fd6fbf0e999e66097e2ed24
Cr-Commit-Position: refs/heads/master@{#400969}

[fdoray, 2016-06-20 15:25:08]

fdoray@chromium.org changed reviewers:
+ hashimoto@chromium.org

[fdoray, 2016-06-20 15:25:09]

Can you review this CL? Thanks.

[hashimoto, 2016-06-21 03:05:52]

lgtm

[fdoray, 2016-06-21 12:40:04]

The CQ bit was checked by fdoray@chromium.org

[commit-bot: I haz the power, 2016-06-21 12:40:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2082653002/1

[commit-bot: I haz the power, 2016-06-21 12:43:30]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-21 12:47:52]

Description was changed from

==========
Use ThreadTaskRunnerHandle::Get() in dbus.

Replace MessageLoop::current()->task_runner() with
ThreadTaskRunnerHandle::Get() in dbus.

Why?
 - The two are equivalent on threads that run a MessageLoop.
 - MessageLoop::current() doesn't work in base/task_scheduler
   because the scheduler's thread don't run MessageLoops.
   This CL will therefore facilitate the migration of browser
   threads to base/task_scheduler.

BUG=616447
==========

to

==========
Use ThreadTaskRunnerHandle::Get() in dbus.

Replace MessageLoop::current()->task_runner() with
ThreadTaskRunnerHandle::Get() in dbus.

Why?
 - The two are equivalent on threads that run a MessageLoop.
 - MessageLoop::current() doesn't work in base/task_scheduler
   because the scheduler's thread don't run MessageLoops.
   This CL will therefore facilitate the migration of browser
   threads to base/task_scheduler.

BUG=616447

Committed: https://crrev.com/af82da320b8ef3521fd6fbf0e999e66097e2ed24
Cr-Commit-Position: refs/heads/master@{#400969}
==========

[commit-bot: I haz the power, 2016-06-21 12:47:53]

Patchset 1 (id:??) landed as
https://crrev.com/af82da320b8ef3521fd6fbf0e999e66097e2ed24
Cr-Commit-Position: refs/heads/master@{#400969}