The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5a7f45dab8372cb7b80ee24dfb137a7ced2049ea

commit 5a7f45dab8372cb7b80ee24dfb137a7ced2049ea
Author: chongz <chongz@chromium.org>
Date: Wed Mar 22 23:13:14 2017

Enable VsyncAlignedInput to field trial

Enable Field Trial on Android, ChromeOS, Linux, Mac, Win.

This patch will cause expected 1 frame delay in
"scheduler.tough_scheduling_cases.first_gesture_scroll_update_latency".

Reasons for the delay:
The synthetic input controller sends |TouchMove| right before |BeginFrame|, which
means the ack will come back later and the generated |GestureScrollUpdate| will falls
into next |BeginFrame|.

This is fine since the actual scroll result won't be rendered until next frame with or
without this patch.

BUG= 704134 

Review-Url: https://codereview.chromium.org/2752363002
Cr-Commit-Position: refs/heads/master@{#458921}

[modify] https://crrev.com/5a7f45dab8372cb7b80ee24dfb137a7ced2049ea/testing/variations/fieldtrial_testing_config.json

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/232fbc4bc87a4c35ea8ab60e1f7ff8e4e8e14de5

commit 232fbc4bc87a4c35ea8ab60e1f7ff8e4e8e14de5
Author: chongz <chongz@chromium.org>
Date: Fri Mar 31 20:14:35 2017

Revert of Enable VsyncAlignedInput to Field Trial (patchset #1 id:40001 of https://codereview.chromium.org/2752363002/ )

Reason for revert:
Reverting due to  issue 704732 . Will try to find the root cause before re-landing.

Original issue's description:
> Enable VsyncAlignedInput to field trial
>
> Enable Field Trial on Android, ChromeOS, Linux, Mac, Win.
>
> This patch will cause expected 1 frame delay in
> "scheduler.tough_scheduling_cases.first_gesture_scroll_update_latency".
>
> Reasons for the delay:
> The synthetic input controller sends |TouchMove| right before |BeginFrame|, which
> means the ack will come back later and the generated |GestureScrollUpdate| will falls
> into next |BeginFrame|.
>
> This is fine since the actual scroll result won't be rendered until next frame with or
> without this patch.
>
> BUG= 704134 
>
> Review-Url: https://codereview.chromium.org/2752363002
> Cr-Commit-Position: refs/heads/master@{#458921}
> Committed: https://chromium.googlesource.com/chromium/src/+/5a7f45dab8372cb7b80ee24dfb137a7ced2049ea

TBR=isherman@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG= 704134 

Review-Url: https://codereview.chromium.org/2791663002
Cr-Commit-Position: refs/heads/master@{#461202}

[modify] https://crrev.com/232fbc4bc87a4c35ea8ab60e1f7ff8e4e8e14de5/testing/variations/fieldtrial_testing_config.json

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/379f637084f5ccfe96bba687afaad8a75f53c3d5

commit 379f637084f5ccfe96bba687afaad8a75f53c3d5
Author: Chong Zhang <chongz@chromium.org>
Date: Mon Jun 26 21:23:59 2017

Re-enable VsyncAlignedInput to Field Trial

Re-enable Field Trial on Android, ChromeOS, Linux, Mac, Win.

The original Field Trial was reverted due to telemetry regression in
|mean_pixels_checkerboarded| and |first_gesture_scroll_update_latency|.
See  crbug.com/704732 

BUG= 704134 

Change-Id: I69916381809913e17a2676b501fb426d517acf2f
Reviewed-on: https://chromium-review.googlesource.com/547095
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Commit-Queue: Chong Zhang <chongz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#482405}
[modify] https://crrev.com/379f637084f5ccfe96bba687afaad8a75f53c3d5/testing/variations/fieldtrial_testing_config.json

Issues revealed by Field Trial was tracked and fixed in  issue 737379 .

Finch Trial was enabled in cl/163204035 and the data obtained was as expected.

Closing as fixed.