Revert of [PageLoadMetrics] Enable AdsPageLoadMetrics by default

Revert of [PageLoadMetrics] Enable AdsPageLoadMetrics by default (patchset #1 id:1 of https://codereview.chromium.org/2887773003/ )

Reason for revert:
Reverting based on findit-for-me notification

Original issue's description:
> [PageLoadMetrics] Enable AdsPageLoadMetrics by default
> 
> Now that we've addressed all of the known causes of crashes, it's time to
> reenable.
> 
> BUG=708570
> 
> Review-Url: https://codereview.chromium.org/2887773003
> Cr-Commit-Position: refs/heads/master@{#472248}
> Committed: https://chromium.googlesource.com/chromium/src/+/6c08596b40d0fb9e1d66ca96b65b2d1a707fcb26

TBR=jkarlin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=708570
Review-Url: https://codereview.chromium.org/2890603005
Cr-Commit-Position: refs/heads/master@{#472285}
Committed: https://chromium.googlesource.com/chromium/src/+/bbfd1d204f097c0dc0e48de1b4cca0169aaf35e6

[Bryan McQuade, 2017-05-17 02:02:04]

The CQ bit was checked by bmcquade@chromium.org

[Bryan McQuade, 2017-05-17 02:02:04]

Created Revert of [PageLoadMetrics] Enable AdsPageLoadMetrics by default

[commit-bot: I haz the power, 2017-05-17 02:05:39]

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, 2017-05-17 02:06:50]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1494986524378700, "parent_rev":
"2e91966df2e6a57cafb584bfa72e19bc2e9bb620", "commit_rev":
"bbfd1d204f097c0dc0e48de1b4cca0169aaf35e6"}

[commit-bot: I haz the power, 2017-05-17 02:07:02]

Description was changed from

==========
Revert of [PageLoadMetrics] Enable AdsPageLoadMetrics by default (patchset #1
id:1 of https://codereview.chromium.org/2887773003/ )

Reason for revert:
Reverting based on findit-for-me notification

Original issue's description:
> [PageLoadMetrics] Enable AdsPageLoadMetrics by default
> 
> Now that we've addressed all of the known causes of crashes, it's time to
> reenable.
> 
> BUG=708570
> 
> Review-Url: https://codereview.chromium.org/2887773003
> Cr-Commit-Position: refs/heads/master@{#472248}
> Committed:
https://chromium.googlesource.com/chromium/src/+/6c08596b40d0fb9e1d66ca96b65b...

TBR=jkarlin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=708570
==========

to

==========
Revert of [PageLoadMetrics] Enable AdsPageLoadMetrics by default (patchset #1
id:1 of https://codereview.chromium.org/2887773003/ )

Reason for revert:
Reverting based on findit-for-me notification

Original issue's description:
> [PageLoadMetrics] Enable AdsPageLoadMetrics by default
> 
> Now that we've addressed all of the known causes of crashes, it's time to
> reenable.
> 
> BUG=708570
> 
> Review-Url: https://codereview.chromium.org/2887773003
> Cr-Commit-Position: refs/heads/master@{#472248}
> Committed:
https://chromium.googlesource.com/chromium/src/+/6c08596b40d0fb9e1d66ca96b65b...

TBR=jkarlin@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=708570

Review-Url: https://codereview.chromium.org/2890603005
Cr-Commit-Position: refs/heads/master@{#472285}
Committed:
https://chromium.googlesource.com/chromium/src/+/bbfd1d204f097c0dc0e48de1b4cc...
==========

[commit-bot: I haz the power, 2017-05-17 02:07:05]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/bbfd1d204f097c0dc0e48de1b4cc...