The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/739049871256fb512841d91a0b8142d695c35546

commit 739049871256fb512841d91a0b8142d695c35546
Author: Tommy Steimel <steimel@chromium.org>
Date: Thu Jul 19 20:54:51 2018

[Media Intent Handler] Add tests for MediaLauncherActivity

This CL adds MediaLauncherActivityTest to test that
MediaLauncherActivity correctly opens CustomTabActivitys for given
media files.

Bug:  861955 
Change-Id: Ie301ccc7699c334efa04b71ea15459ef2e6df333
Reviewed-on: https://chromium-review.googlesource.com/1140681
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576618}
[modify] https://crrev.com/739049871256fb512841d91a0b8142d695c35546/chrome/android/java/src/org/chromium/chrome/browser/media/MediaViewerUtils.java
[modify] https://crrev.com/739049871256fb512841d91a0b8142d695c35546/chrome/android/java_sources.gni
[add] https://crrev.com/739049871256fb512841d91a0b8142d695c35546/chrome/android/javatests/src/org/chromium/chrome/browser/media/MediaLauncherActivityTest.java