The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/537d8214eda75854ca46c796d19f85216faf1d19

commit 537d8214eda75854ca46c796d19f85216faf1d19
Author: lawrencewu <lawrencewu@chromium.org>
Date: Fri Nov 25 23:57:06 2016

Bump field trial allocator size to 128 KiB

It appears some users are hitting the previous 64 KiB limit.
https://uma.googleplex.com/histograms/?endDate=20161124&dayCount=1&histograms=UMA.PersistentAllocator.FieldTrialAllocator.Allocs%2CUMA.PersistentAllocator.FieldTrialAllocator.UsedPct&fixupData=true&showMax=true&filters=channel%2Ceq%2C1%2Cisofficial%2Ceq%2CTrue&implicitFilters=isofficial

BUG= 668747 

Review-Url: https://codereview.chromium.org/2529183002
Cr-Commit-Position: refs/heads/master@{#434557}

[modify] https://crrev.com/537d8214eda75854ca46c796d19f85216faf1d19/base/metrics/field_trial.cc