Reland of Change ProcessThread's task type to be the one from TaskQueue.

Reland of Change ProcessThread's task type to be the one from TaskQueue. (patchset #1 id:1 of https://codereview.webrtc.org/2020783003/ )

Reason for revert:
Reland. It was a false alarm.

Original issue's description:
> Revert of Change ProcessThread's task type to be the one from TaskQueue. (patchset #3 id:80001 of https://codereview.webrtc.org/2016043003/ )
>
> Reason for revert:
> Downstream issues
>
> Original issue's description:
> > Change ProcessThread's task type to be the one from TaskQueue.
> > ProcessThread will eventually be replaced by TaskQueue, so this is the first little step.
> >
> > BUG=
> > R=magjed@webrtc.org
> >
> > Committed: https://crrev.com/400a276c8a0b299190ff17a81edd8780a26d63d3
> > Cr-Commit-Position: refs/heads/master@{#12952}
>
> TBR=magjed@webrtc.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=
>
> Committed: https://crrev.com/641455176a1241dea6dda7071ba4162f41a0b5fc
> Cr-Commit-Position: refs/heads/master@{#12953}

TBR=magjed@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://crrev.com/435f98bc90b7cd0dd429711a67d9322443ffb122
Cr-Commit-Position: refs/heads/master@{#12954}

[tommi, 2016-05-28 21:57:03]

The CQ bit was checked by tommi@webrtc.org

[tommi, 2016-05-28 21:57:04]

Created Reland of Change ProcessThread's task type to be the one from TaskQueue.

[commit-bot: I haz the power, 2016-05-28 21:57:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2017333002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/2017333002/1

[commit-bot: I haz the power, 2016-05-28 21:57:20]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-28 21:57:28]

Description was changed from

==========
Reland of Change ProcessThread's task type to be the one from TaskQueue.
(patchset #1 id:1 of https://codereview.webrtc.org/2020783003/ )

Reason for revert:
Reland. It was a false alarm.

Original issue's description:
> Revert of Change ProcessThread's task type to be the one from TaskQueue.
(patchset #3 id:80001 of https://codereview.webrtc.org/2016043003/ )
> 
> Reason for revert:
> Downstream issues
> 
> Original issue's description:
> > Change ProcessThread's task type to be the one from TaskQueue.
> > ProcessThread will eventually be replaced by TaskQueue, so this is the first
little step.
> >
> > BUG=
> > R=magjed@webrtc.org
> >
> > Committed: https://crrev.com/400a276c8a0b299190ff17a81edd8780a26d63d3
> > Cr-Commit-Position: refs/heads/master@{#12952}
> 
> TBR=magjed@webrtc.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=
> 
> Committed: https://crrev.com/641455176a1241dea6dda7071ba4162f41a0b5fc
> Cr-Commit-Position: refs/heads/master@{#12953}

TBR=magjed@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=
==========

to

==========
Reland of Change ProcessThread's task type to be the one from TaskQueue.
(patchset #1 id:1 of https://codereview.webrtc.org/2020783003/ )

Reason for revert:
Reland. It was a false alarm.

Original issue's description:
> Revert of Change ProcessThread's task type to be the one from TaskQueue.
(patchset #3 id:80001 of https://codereview.webrtc.org/2016043003/ )
>
> Reason for revert:
> Downstream issues
>
> Original issue's description:
> > Change ProcessThread's task type to be the one from TaskQueue.
> > ProcessThread will eventually be replaced by TaskQueue, so this is the first
little step.
> >
> > BUG=
> > R=magjed@webrtc.org
> >
> > Committed: https://crrev.com/400a276c8a0b299190ff17a81edd8780a26d63d3
> > Cr-Commit-Position: refs/heads/master@{#12952}
>
> TBR=magjed@webrtc.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=
>
> Committed: https://crrev.com/641455176a1241dea6dda7071ba4162f41a0b5fc
> Cr-Commit-Position: refs/heads/master@{#12953}

TBR=magjed@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://crrev.com/435f98bc90b7cd0dd429711a67d9322443ffb122
Cr-Commit-Position: refs/heads/master@{#12954}
==========

[commit-bot: I haz the power, 2016-05-28 21:57:29]

Patchset 1 (id:??) landed as
https://crrev.com/435f98bc90b7cd0dd429711a67d9322443ffb122
Cr-Commit-Position: refs/heads/master@{#12954}