The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/affa8f07a698002608af8dfd6a532dd97a8128f1

commit affa8f07a698002608af8dfd6a532dd97a8128f1
Author: Yash Malik <ymalik@google.com>
Date: Tue Sep 19 18:55:13 2017

[vr] Add GetTarget* getters for all animation types in vr::AnimationPlayer

There's a lot of room for duplicate code removal using templates. This is
tracked in  crbug.com/754820 .

Bug:  754822 ,  765775 
Change-Id: I310ea2414735b13df52c52bd018173b92597a6e4
Reviewed-on: https://chromium-review.googlesource.com/671065
Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Reviewed-by: Christopher Grant <cjgrant@chromium.org>
Commit-Queue: Yash Malik <ymalik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#502903}
[modify] https://crrev.com/affa8f07a698002608af8dfd6a532dd97a8128f1/chrome/browser/vr/animation_player.cc
[modify] https://crrev.com/affa8f07a698002608af8dfd6a532dd97a8128f1/chrome/browser/vr/animation_player.h
[modify] https://crrev.com/affa8f07a698002608af8dfd6a532dd97a8128f1/chrome/browser/vr/animation_player_unittest.cc
[modify] https://crrev.com/affa8f07a698002608af8dfd6a532dd97a8128f1/chrome/browser/vr/elements/ui_element.cc
[modify] https://crrev.com/affa8f07a698002608af8dfd6a532dd97a8128f1/chrome/browser/vr/elements/ui_element.h
[modify] https://crrev.com/affa8f07a698002608af8dfd6a532dd97a8128f1/chrome/browser/vr/test/animation_utils.cc
[modify] https://crrev.com/affa8f07a698002608af8dfd6a532dd97a8128f1/chrome/browser/vr/test/animation_utils.h
[modify] https://crrev.com/affa8f07a698002608af8dfd6a532dd97a8128f1/chrome/browser/vr/test/constants.h
[modify] https://crrev.com/affa8f07a698002608af8dfd6a532dd97a8128f1/chrome/browser/vr/ui_scene_manager.cc
[modify] https://crrev.com/affa8f07a698002608af8dfd6a532dd97a8128f1/chrome/browser/vr/ui_scene_manager_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/aa5131c67a1db75f67fa3009529911c322b12a1c

commit aa5131c67a1db75f67fa3009529911c322b12a1c
Author: Yash Malik <ymalik@google.com>
Date: Thu Sep 21 21:47:55 2017

[vr] Replace TransienceManager with TransientElement.

This CL introduces TransientElement whose purpose is to hide its portion of the
subtree after a set timeout.

All the transient elements now have a TransientElement parent and UiSceneManager
changes visibility on the parent instead of the child directly.

Bug:  765775 
Change-Id: I563a72a8d53507bfa91f5fef317ce6ff8ae4f136
Reviewed-on: https://chromium-review.googlesource.com/669009
Commit-Queue: Yash Malik <ymalik@chromium.org>
Reviewed-by: Christopher Grant <cjgrant@chromium.org>
Cr-Commit-Position: refs/heads/master@{#503572}
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/BUILD.gn
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/elements/exclusive_screen_toast.cc
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/elements/exclusive_screen_toast.h
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/elements/simple_textured_element.h
[delete] https://crrev.com/2a23e10592bac278c1f7bf201e7d0401aa3e9bc3/chrome/browser/vr/elements/transience_manager.cc
[delete] https://crrev.com/2a23e10592bac278c1f7bf201e7d0401aa3e9bc3/chrome/browser/vr/elements/transience_manager.h
[delete] https://crrev.com/2a23e10592bac278c1f7bf201e7d0401aa3e9bc3/chrome/browser/vr/elements/transience_manager_unittest.cc
[add] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/elements/transient_element.cc
[add] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/elements/transient_element.h
[add] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/elements/transient_element_unittest.cc
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/elements/ui_element.cc
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/elements/ui_element.h
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/elements/ui_element_name.h
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/elements/ui_element_unittest.cc
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/elements/webvr_url_toast.cc
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/elements/webvr_url_toast.h
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/ui_scene.cc
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/ui_scene_manager.cc
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/ui_scene_manager.h
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/ui_scene_manager_unittest.cc
[modify] https://crrev.com/aa5131c67a1db75f67fa3009529911c322b12a1c/chrome/browser/vr/ui_scene_unittest.cc