The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/dd0f00b919e8fd932c2b63871463ffbc17194d1d

commit dd0f00b919e8fd932c2b63871463ffbc17194d1d
Author: Shakti Sahu <shaktisahu@chromium.org>
Date: Fri May 18 15:06:23 2018

Download Infobar : Show IPH

Added two IPH for the accelerated infobar
1 - When infobar is closed, IPH would show up with message "Your download is still running"
2 - When the infobar starts up, IPH would show up with message "Chrome now downloads files faster"

Bug:  844201 
Change-Id: Id1ccde95e0175ce285c29f033b0bf23996433f7d
Reviewed-on: https://chromium-review.googlesource.com/1054157
Commit-Queue: Shakti Sahu <shaktisahu@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559894}
[modify] https://crrev.com/dd0f00b919e8fd932c2b63871463ffbc17194d1d/chrome/android/java/src/org/chromium/chrome/browser/ChromeTabbedActivity.java
[modify] https://crrev.com/dd0f00b919e8fd932c2b63871463ffbc17194d1d/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadInfoBarController.java
[modify] https://crrev.com/dd0f00b919e8fd932c2b63871463ffbc17194d1d/chrome/android/java/src/org/chromium/chrome/browser/infobar/IPHBubbleDelegateImpl.java
[modify] https://crrev.com/dd0f00b919e8fd932c2b63871463ffbc17194d1d/chrome/android/java/src/org/chromium/chrome/browser/infobar/IPHInfoBarSupport.java
[modify] https://crrev.com/dd0f00b919e8fd932c2b63871463ffbc17194d1d/chrome/android/java/strings/android_chrome_strings.grd
[modify] https://crrev.com/dd0f00b919e8fd932c2b63871463ffbc17194d1d/components/feature_engagement/public/android/java/src/org/chromium/components/feature_engagement/FeatureConstants.java
[modify] https://crrev.com/dd0f00b919e8fd932c2b63871463ffbc17194d1d/components/feature_engagement/public/feature_constants.cc
[modify] https://crrev.com/dd0f00b919e8fd932c2b63871463ffbc17194d1d/components/feature_engagement/public/feature_constants.h
[modify] https://crrev.com/dd0f00b919e8fd932c2b63871463ffbc17194d1d/components/feature_engagement/public/feature_list.cc
[modify] https://crrev.com/dd0f00b919e8fd932c2b63871463ffbc17194d1d/components/feature_engagement/public/feature_list.h
[modify] https://crrev.com/dd0f00b919e8fd932c2b63871463ffbc17194d1d/testing/variations/fieldtrial_testing_config.json
[modify] https://crrev.com/dd0f00b919e8fd932c2b63871463ffbc17194d1d/tools/metrics/histograms/histograms.xml