The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7b41f128f7b2039e051a7256b6fc53bb5d1eb634

commit 7b41f128f7b2039e051a7256b6fc53bb5d1eb634
Author: Ian Vollick <vollick@chromium.org>
Date: Tue Dec 19 15:50:12 2017

[vr] Bounds-contains-children and linear layout should account for scale

Previously, size would not be considered when performing a linear layout
or when containing children. With this CL, both now accommodate scaled
elements.

Bug:  788762 
Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I9f676956b8d109afde0443507b6130af5a46507a
Reviewed-on: https://chromium-review.googlesource.com/832827
Commit-Queue: Ian Vollick <vollick@chromium.org>
Reviewed-by: Christopher Grant <cjgrant@chromium.org>
Reviewed-by: Biao She <bshe@chromium.org>
Cr-Commit-Position: refs/heads/master@{#525040}
[modify] https://crrev.com/7b41f128f7b2039e051a7256b6fc53bb5d1eb634/chrome/browser/vr/elements/linear_layout.cc
[modify] https://crrev.com/7b41f128f7b2039e051a7256b6fc53bb5d1eb634/chrome/browser/vr/elements/linear_layout_unittest.cc
[modify] https://crrev.com/7b41f128f7b2039e051a7256b6fc53bb5d1eb634/chrome/browser/vr/elements/ui_element.cc
[modify] https://crrev.com/7b41f128f7b2039e051a7256b6fc53bb5d1eb634/chrome/browser/vr/elements/ui_element_unittest.cc