The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/604301415a66f8cc62fda5bd67962179ffeefe75

commit 604301415a66f8cc62fda5bd67962179ffeefe75
Author: bsheedy <bsheedy@chromium.org>
Date: Mon Jul 17 17:21:17 2017

Add VR e2e tests for controller app button

Adds two VR instrumentation tests to check that pressing the Daydream
controller's "app" button causes the browser to exit WebVR presentation
and fullscreen.

Bug:  742569 ,  728779 
Change-Id: I11b92d876875e6224b30b0d5eab498786f698fbf
Reviewed-on: https://chromium-review.googlesource.com/571387
Reviewed-by: Michael Thiessen <mthiesse@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487131}
[modify] https://crrev.com/604301415a66f8cc62fda5bd67962179ffeefe75/chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/EmulatedVrController.java
[modify] https://crrev.com/604301415a66f8cc62fda5bd67962179ffeefe75/chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/VrShellControllerInputTest.java
[modify] https://crrev.com/604301415a66f8cc62fda5bd67962179ffeefe75/chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/WebVrInputTest.java