The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/cd6fba28ef71bda90881cbef7b18d6437d66cdc0

commit cd6fba28ef71bda90881cbef7b18d6437d66cdc0
Author: Tarun Bansal <tbansal@chromium.org>
Date: Mon Jan 08 21:34:36 2018

Enable DataReductionProxySiteBreakdown feature by default
on Android, and disable on non-Android.

It has been enabled for 100% population for M61+ stable since
September 2017.

Bug:  800081 
Change-Id: I120cdfced272ecd27daf09dedb734588d4b8f043
Reviewed-on: https://chromium-review.googlesource.com/850849
Commit-Queue: Tarun Bansal <tbansal@chromium.org>
Reviewed-by: Jesse Doherty <jwd@chromium.org>
Reviewed-by: Tommy Nyquist <nyquist@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Scott Little <sclittle@chromium.org>
Cr-Commit-Position: refs/heads/master@{#527761}
[delete] https://crrev.com/023dc17fbac58909877928165a9350b7d1895fe1/chrome/android/java/res/layout/data_reduction_old_stats_layout.xml
[modify] https://crrev.com/cd6fba28ef71bda90881cbef7b18d6437d66cdc0/chrome/android/java/src/org/chromium/chrome/browser/ChromeFeatureList.java
[modify] https://crrev.com/cd6fba28ef71bda90881cbef7b18d6437d66cdc0/chrome/android/java/src/org/chromium/chrome/browser/preferences/datareduction/DataReductionStatsPreference.java
[modify] https://crrev.com/cd6fba28ef71bda90881cbef7b18d6437d66cdc0/chrome/android/javatests/src/org/chromium/chrome/browser/preferences/datareduction/DataReductionStatsPreferenceTest.java
[modify] https://crrev.com/cd6fba28ef71bda90881cbef7b18d6437d66cdc0/chrome/browser/about_flags.cc
[modify] https://crrev.com/cd6fba28ef71bda90881cbef7b18d6437d66cdc0/chrome/browser/android/chrome_feature_list.cc
[modify] https://crrev.com/cd6fba28ef71bda90881cbef7b18d6437d66cdc0/chrome/browser/flag_descriptions.cc
[modify] https://crrev.com/cd6fba28ef71bda90881cbef7b18d6437d66cdc0/chrome/browser/flag_descriptions.h
[modify] https://crrev.com/cd6fba28ef71bda90881cbef7b18d6437d66cdc0/components/data_reduction_proxy/core/browser/data_reduction_proxy_compression_stats.cc
[modify] https://crrev.com/cd6fba28ef71bda90881cbef7b18d6437d66cdc0/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.cc
[modify] https://crrev.com/cd6fba28ef71bda90881cbef7b18d6437d66cdc0/components/data_reduction_proxy/core/common/data_reduction_proxy_features.cc
[modify] https://crrev.com/cd6fba28ef71bda90881cbef7b18d6437d66cdc0/components/data_reduction_proxy/core/common/data_reduction_proxy_features.h
[modify] https://crrev.com/cd6fba28ef71bda90881cbef7b18d6437d66cdc0/testing/variations/fieldtrial_testing_config.json
[modify] https://crrev.com/cd6fba28ef71bda90881cbef7b18d6437d66cdc0/tools/metrics/histograms/enums.xml