Revert of Add crash keys about field trial shared memory errors.

Revert of Add crash keys about field trial shared memory errors. (patchset #3 id:140001 of https://codereview.chromium.org/2872503003/ )

Reason for revert:
No crashes observed that this instrumentation was meant to help with. Reverting the change.

Original issue's description:
> Add crash keys about field trial shared memory errors.
> 
> This is needed to figure out the cause of the failures in field
> trial shared memory allocation & map operations.
> 
> Adds crash keys for the error values when shared memory
> APIs fail from field trial code, to diagnose the crash causes.
> 
> The temporary logging CL adds coverage to Mac codepaths
> specifically, since that is the issue being investigated. The
> plan is to clean up the code once the crbug has been fixed.
> 
> BUG=703649
> 
> Review-Url: https://codereview.chromium.org/2872503003
> Cr-Commit-Position: refs/heads/master@{#470802}
> Committed: https://chromium.googlesource.com/chromium/src/+/0fe371d918bf4d467619c1cd2d9fd9f3ee117add

TBR=erikchen@chromium.org,thakis@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=703649
Review-Url: https://codereview.chromium.org/2929013002
Cr-Commit-Position: refs/heads/master@{#478076}
Committed: https://chromium.googlesource.com/chromium/src/+/c2f02c3631738dc1c4f630eaa430b96d03057123

[Alexei Svitkine (slow), 2017-06-08 17:32:29]

The CQ bit was checked by asvitkine@chromium.org

[Alexei Svitkine (slow), 2017-06-08 17:32:30]

Created Revert of Add crash keys about field trial shared memory errors.

[commit-bot: I haz the power, 2017-06-08 17:33:00]

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, 2017-06-08 17:36:08]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-06-08 17:36:09]

Try jobs failed on following builders:
  ios-simulator on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator/bui...)
  ios-simulator-xcode-clang on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator-xco...)
  mac_chromium_compile_dbg_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[Alexei Svitkine (slow), 2017-06-08 17:56:44]

Rebased.

[Alexei Svitkine (slow), 2017-06-08 17:57:35]

The CQ bit was checked by asvitkine@chromium.org

[commit-bot: I haz the power, 2017-06-08 17:58:07]

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, 2017-06-08 20:41:44]

CQ is committing da patch.

Bot data: {"patchset_id": 170001, "attempt_start_ts": 1496944655323910,
"parent_rev": "adff1888d85427a6adb9b9b442575875f0d108bb", "commit_rev":
"c2f02c3631738dc1c4f630eaa430b96d03057123"}

[commit-bot: I haz the power, 2017-06-08 20:41:56]

Description was changed from

==========
Revert of Add crash keys about field trial shared memory errors. (patchset #3
id:140001 of https://codereview.chromium.org/2872503003/ )

Reason for revert:
No crashes observed that this instrumentation was meant to help with. Reverting
the change.

Original issue's description:
> Add crash keys about field trial shared memory errors.
> 
> This is needed to figure out the cause of the failures in field
> trial shared memory allocation & map operations.
> 
> Adds crash keys for the error values when shared memory
> APIs fail from field trial code, to diagnose the crash causes.
> 
> The temporary logging CL adds coverage to Mac codepaths
> specifically, since that is the issue being investigated. The
> plan is to clean up the code once the crbug has been fixed.
> 
> BUG=703649
> 
> Review-Url: https://codereview.chromium.org/2872503003
> Cr-Commit-Position: refs/heads/master@{#470802}
> Committed:
https://chromium.googlesource.com/chromium/src/+/0fe371d918bf4d467619c1cd2d9f...

TBR=erikchen@chromium.org,thakis@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=703649
==========

to

==========
Revert of Add crash keys about field trial shared memory errors. (patchset #3
id:140001 of https://codereview.chromium.org/2872503003/ )

Reason for revert:
No crashes observed that this instrumentation was meant to help with. Reverting
the change.

Original issue's description:
> Add crash keys about field trial shared memory errors.
> 
> This is needed to figure out the cause of the failures in field
> trial shared memory allocation & map operations.
> 
> Adds crash keys for the error values when shared memory
> APIs fail from field trial code, to diagnose the crash causes.
> 
> The temporary logging CL adds coverage to Mac codepaths
> specifically, since that is the issue being investigated. The
> plan is to clean up the code once the crbug has been fixed.
> 
> BUG=703649
> 
> Review-Url: https://codereview.chromium.org/2872503003
> Cr-Commit-Position: refs/heads/master@{#470802}
> Committed:
https://chromium.googlesource.com/chromium/src/+/0fe371d918bf4d467619c1cd2d9f...

TBR=erikchen@chromium.org,thakis@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=703649

Review-Url: https://codereview.chromium.org/2929013002
Cr-Commit-Position: refs/heads/master@{#478076}
Committed:
https://chromium.googlesource.com/chromium/src/+/c2f02c3631738dc1c4f630eaa430...
==========

[commit-bot: I haz the power, 2017-06-08 20:41:58]

Committed patchset #2 (id:170001) as
https://chromium.googlesource.com/chromium/src/+/c2f02c3631738dc1c4f630eaa430...