The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0cb7b5282e216024f887c9addc24b8fc5731f6f5

commit 0cb7b5282e216024f887c9addc24b8fc5731f6f5
Author: asvitkine <asvitkine@chromium.org>
Date: Tue Nov 22 20:40:03 2016

Fix getting initially active trials with shared memory.

With the shared memory implementation, the logic for
getting initially active trials was no longer valid. This
change fixes that by getting the active trials from the
shared memory allocator if available.

BUG= 666497 

Review-Url: https://codereview.chromium.org/2504163005
Cr-Commit-Position: refs/heads/master@{#433969}

[modify] https://crrev.com/0cb7b5282e216024f887c9addc24b8fc5731f6f5/base/metrics/field_trial.cc
[modify] https://crrev.com/0cb7b5282e216024f887c9addc24b8fc5731f6f5/base/metrics/field_trial.h
[modify] https://crrev.com/0cb7b5282e216024f887c9addc24b8fc5731f6f5/chrome/common/variations/child_process_field_trial_syncer.cc
[modify] https://crrev.com/0cb7b5282e216024f887c9addc24b8fc5731f6f5/chrome/common/variations/child_process_field_trial_syncer_unittest.cc
[modify] https://crrev.com/0cb7b5282e216024f887c9addc24b8fc5731f6f5/content/public/test/render_view_test.cc
[modify] https://crrev.com/0cb7b5282e216024f887c9addc24b8fc5731f6f5/content/public/test/render_view_test.h