Revert of Enable shared memory for field trials

Revert of Enable shared memory for field trials (patchset #2 id:20001 of https://codereview.chromium.org/2469503003/ )

Reason for revert:
Appears to have caused renderer processes to lose knowledge of Finch trials, which led to a large spike in CreateFrame crashes for OOPIFs in https://crbug.com/661617.

Original issue's description:
> Enable shared memory for field trials
>
> This turns on the flag for using shared memory to share field trials between processes. For more context, see:
>
> The design document: go/share-field-trials
>
> The related previous CLs:
> https://codereview.chromium.org/2365273004/
> https://codereview.chromium.org/2412113002/
> https://codereview.chromium.org/2449143002/
> https://codereview.chromium.org/2453093002/
> https://codereview.chromium.org/2449783007/
> https://codereview.chromium.org/2456723004/
> https://codereview.chromium.org/2453933004/
>
> BUG=131632
>
> Committed: https://crrev.com/4446189e8148980b9a245cb1157e8a695bac35d1
> Cr-Commit-Position: refs/heads/master@{#429042}

TBR=asvitkine@chromium.org,lawrencewu@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=131632
Committed: https://crrev.com/879e4e0e450d21fc6eb22dde4456362cc0fc335d
Cr-Commit-Position: refs/heads/master@{#429440}

[Charlie Reis, 2016-11-02 21:35:51]

The CQ bit was checked by creis@chromium.org

[Charlie Reis, 2016-11-02 21:35:51]

Created Revert of Enable shared memory for field trials

[commit-bot: I haz the power, 2016-11-02 21:36:41]

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

[Alexei Svitkine (slow), 2016-11-02 21:40:37]

lgtm

[commit-bot: I haz the power, 2016-11-02 23:06:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-02 23:07:54]

Description was changed from

==========
Revert of Enable shared memory for field trials (patchset #2 id:20001 of
https://codereview.chromium.org/2469503003/ )

Reason for revert:
Appears to have caused renderer processes to lose knowledge of Finch trials,
which led to a large spike in CreateFrame crashes for OOPIFs in
https://crbug.com/661617.

Original issue's description:
> Enable shared memory for field trials
> 
> This turns on the flag for using shared memory to share field trials between
processes. For more context, see:
> 
> The design document: go/share-field-trials
> 
> The related previous CLs:
> https://codereview.chromium.org/2365273004/
> https://codereview.chromium.org/2412113002/
> https://codereview.chromium.org/2449143002/
> https://codereview.chromium.org/2453093002/
> https://codereview.chromium.org/2449783007/
> https://codereview.chromium.org/2456723004/
> https://codereview.chromium.org/2453933004/
> 
> BUG=131632
> 
> Committed: https://crrev.com/4446189e8148980b9a245cb1157e8a695bac35d1
> Cr-Commit-Position: refs/heads/master@{#429042}

TBR=asvitkine@chromium.org,lawrencewu@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=131632
==========

to

==========
Revert of Enable shared memory for field trials (patchset #2 id:20001 of
https://codereview.chromium.org/2469503003/ )

Reason for revert:
Appears to have caused renderer processes to lose knowledge of Finch trials,
which led to a large spike in CreateFrame crashes for OOPIFs in
https://crbug.com/661617.

Original issue's description:
> Enable shared memory for field trials
>
> This turns on the flag for using shared memory to share field trials between
processes. For more context, see:
>
> The design document: go/share-field-trials
>
> The related previous CLs:
> https://codereview.chromium.org/2365273004/
> https://codereview.chromium.org/2412113002/
> https://codereview.chromium.org/2449143002/
> https://codereview.chromium.org/2453093002/
> https://codereview.chromium.org/2449783007/
> https://codereview.chromium.org/2456723004/
> https://codereview.chromium.org/2453933004/
>
> BUG=131632
>
> Committed: https://crrev.com/4446189e8148980b9a245cb1157e8a695bac35d1
> Cr-Commit-Position: refs/heads/master@{#429042}

TBR=asvitkine@chromium.org,lawrencewu@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=131632

Committed: https://crrev.com/879e4e0e450d21fc6eb22dde4456362cc0fc335d
Cr-Commit-Position: refs/heads/master@{#429440}
==========

[commit-bot: I haz the power, 2016-11-02 23:07:54]

Patchset 1 (id:??) landed as
https://crrev.com/879e4e0e450d21fc6eb22dde4456362cc0fc335d
Cr-Commit-Position: refs/heads/master@{#429440}