The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/40ce67dbab5aa8bc40a9617f1742b9483ce60a0c

commit 40ce67dbab5aa8bc40a9617f1742b9483ce60a0c
Author: Angela S <angelashao@google.com>
Date: Wed May 31 22:46:12 2017

chrome/android: Add events for data saver in product help.

We need the following events to be able to know when the Data Saver App
menu in-product help UI should be triggered. This patch plumbs events
necessary for it to the FeatureEngagementTracker.

The DATA_SAVED_ON_PAGE_LOAD event is tracked when data is saved between
the start and end of a page load. It is fine that this event is tracked
when multiple tabs load data at the same time (i.e. data may have been
saved by a page different from the page this event is tracked) because
the goal is just to track how much the data saver is used at a time.

The OVERFLOW_OPENED_WITH_DATA_SAVER_SHOWN event is tracked when the
overflow menu is opened while the data saver is on/shown. This is to
track that the user sees the Data Saver feature (but has not necessarily
used it).

The DATA_SAVER_DETAIL_OPENED event is tracked when the Data Saver footer
is tapped on to open the data saver detail. This is to track the usage
of this feature.

BUG= 725311 

Change-Id: I519eec758fc0b24b49f6c5dfdb6bf7d9a9ae9f9a
Reviewed-on: https://chromium-review.googlesource.com/515722
Reviewed-by: Tommy Nyquist <nyquist@chromium.org>
Commit-Queue: Angela Shao <angelashao@google.com>
Cr-Commit-Position: refs/heads/master@{#476072}
[modify] https://crrev.com/40ce67dbab5aa8bc40a9617f1742b9483ce60a0c/chrome/android/java/src/org/chromium/chrome/browser/preferences/datareduction/DataReductionMainMenuFooter.java
[modify] https://crrev.com/40ce67dbab5aa8bc40a9617f1742b9483ce60a0c/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
[modify] https://crrev.com/40ce67dbab5aa8bc40a9617f1742b9483ce60a0c/chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarManager.java
[modify] https://crrev.com/40ce67dbab5aa8bc40a9617f1742b9483ce60a0c/components/feature_engagement_tracker/public/android/java/src/org/chromium/components/feature_engagement_tracker/EventConstants.java

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f509287ecc71c3b3c958b7081354590356690efd

commit f509287ecc71c3b3c958b7081354590356690efd
Author: Angela S <angelashao@google.com>
Date: Tue Jun 06 02:06:12 2017

chrome/android: Add feature for data saver in-product help.

We need to check whether to trigger the Data Saver app menu in-product
help UI when a page load finishes. This patch checks that and displays
the data saver in-product help UI.

BUG= 725311 

Change-Id: I2cacc80372e4ff9424ab5dae544e916a4e9965ec
Reviewed-on: https://chromium-review.googlesource.com/518347
Reviewed-by: Matthew Jones <mdjones@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Tommy Nyquist <nyquist@chromium.org>
Commit-Queue: Angela Shao <angelashao@google.com>
Cr-Commit-Position: refs/heads/master@{#477154}
[modify] https://crrev.com/f509287ecc71c3b3c958b7081354590356690efd/chrome/android/java/src/org/chromium/chrome/browser/infobar/IPHInfoBarSupport.java
[modify] https://crrev.com/f509287ecc71c3b3c958b7081354590356690efd/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
[modify] https://crrev.com/f509287ecc71c3b3c958b7081354590356690efd/chrome/android/java/strings/android_chrome_strings.grd
[modify] https://crrev.com/f509287ecc71c3b3c958b7081354590356690efd/components/feature_engagement_tracker/public/android/java/src/org/chromium/components/feature_engagement_tracker/FeatureConstants.java
[modify] https://crrev.com/f509287ecc71c3b3c958b7081354590356690efd/components/feature_engagement_tracker/public/feature_constants.cc
[modify] https://crrev.com/f509287ecc71c3b3c958b7081354590356690efd/components/feature_engagement_tracker/public/feature_constants.h
[modify] https://crrev.com/f509287ecc71c3b3c958b7081354590356690efd/components/feature_engagement_tracker/public/feature_list.cc
[modify] https://crrev.com/f509287ecc71c3b3c958b7081354590356690efd/components/feature_engagement_tracker/public/feature_list.h

Issue 723008 has been merged into this issue.