Revert of Always use an external begin frame source in the renderer

Revert of Always use an external begin frame source in the renderer (patchset #4 id:60001 of https://codereview.chromium.org/2083423006/ )

Reason for revert:
This apparently broke blimp tests: https://build.chromium.org/p/chromium.linux/builders/Blimp%20Linux%20%28dbg%29/builds/6898/steps/blimp_browsertests/logs/stdio

Original issue's description:
> Always use an external begin frame source in the renderer
>
> Tests still aren't using an external begin frame source, so this is just
> a staging step.  The next step is to move BFS into output surface,
> remove external begin frame sources from cc's API, and then to remove
> the default BFS in cc's proxies once output sources are the only way to
> get a BFS.
>
> Committed: https://crrev.com/3ba9b9d3500d799ee36bd41d0b36aecbc924111a
> Cr-Commit-Position: refs/heads/master@{#411809}

TBR=sievers@chromium.org,enne@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/ba7296e9230d751eeddd23b42be7f6f7cf487a60
Cr-Commit-Position: refs/heads/master@{#411839}

[caseq, 2016-08-13 00:58:25]

The CQ bit was checked by caseq@chromium.org

[caseq, 2016-08-13 00:58:25]

Created Revert of Always use an external begin frame source in the renderer

[commit-bot: I haz the power, 2016-08-13 00:58:48]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-13 00:59:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-13 01:06:16]

Description was changed from

==========
Revert of Always use an external begin frame source in the renderer (patchset #4
id:60001 of https://codereview.chromium.org/2083423006/ )

Reason for revert:
This apparently broke blimp tests:
https://build.chromium.org/p/chromium.linux/builders/Blimp%20Linux%20%28dbg%2...

Original issue's description:
> Always use an external begin frame source in the renderer
> 
> Tests still aren't using an external begin frame source, so this is just
> a staging step.  The next step is to move BFS into output surface,
> remove external begin frame sources from cc's API, and then to remove
> the default BFS in cc's proxies once output sources are the only way to
> get a BFS.
> 
> Committed: https://crrev.com/3ba9b9d3500d799ee36bd41d0b36aecbc924111a
> Cr-Commit-Position: refs/heads/master@{#411809}

TBR=sievers@chromium.org,enne@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
==========

to

==========
Revert of Always use an external begin frame source in the renderer (patchset #4
id:60001 of https://codereview.chromium.org/2083423006/ )

Reason for revert:
This apparently broke blimp tests:
https://build.chromium.org/p/chromium.linux/builders/Blimp%20Linux%20%28dbg%2...

Original issue's description:
> Always use an external begin frame source in the renderer
>
> Tests still aren't using an external begin frame source, so this is just
> a staging step.  The next step is to move BFS into output surface,
> remove external begin frame sources from cc's API, and then to remove
> the default BFS in cc's proxies once output sources are the only way to
> get a BFS.
>
> Committed: https://crrev.com/3ba9b9d3500d799ee36bd41d0b36aecbc924111a
> Cr-Commit-Position: refs/heads/master@{#411809}

TBR=sievers@chromium.org,enne@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/ba7296e9230d751eeddd23b42be7f6f7cf487a60
Cr-Commit-Position: refs/heads/master@{#411839}
==========

[commit-bot: I haz the power, 2016-08-13 01:06:17]

Patchset 1 (id:??) landed as
https://crrev.com/ba7296e9230d751eeddd23b42be7f6f7cf487a60
Cr-Commit-Position: refs/heads/master@{#411839}