The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/92619d7e8b26975354187ea6e81ac98b49da6953

commit 92619d7e8b26975354187ea6e81ac98b49da6953
Author: Tommy Steimel <steimel@chromium.org>
Date: Thu Apr 12 06:52:47 2018

Only show default poster when the controls attr is set

TBR=mlamouri@chromium.org

Bug:  831688 
Change-Id: I2086288cef72e2c2cc7ba581d4b7fb4f00562969
Reviewed-on: https://chromium-review.googlesource.com/1007887
Reviewed-by: Tommy Steimel <steimel@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Reviewed-by: Becca Hughes <beccahughes@chromium.org>
Commit-Queue: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#550056}
[modify] https://crrev.com/92619d7e8b26975354187ea6e81ac98b49da6953/third_party/WebKit/LayoutTests/compositing/squashing/dont-squash-into-videos-expected.txt
[modify] https://crrev.com/92619d7e8b26975354187ea6e81ac98b49da6953/third_party/WebKit/LayoutTests/flag-specific/disable-blink-features=RootLayerScrolling/compositing/squashing/dont-squash-into-videos-expected.txt
[modify] https://crrev.com/92619d7e8b26975354187ea6e81ac98b49da6953/third_party/WebKit/LayoutTests/virtual/disable-rls/compositing/squashing/dont-squash-into-videos-expected.txt
[modify] https://crrev.com/92619d7e8b26975354187ea6e81ac98b49da6953/third_party/WebKit/LayoutTests/virtual/disable-spv175/compositing/squashing/dont-squash-into-videos-expected.txt
[modify] https://crrev.com/92619d7e8b26975354187ea6e81ac98b49da6953/third_party/blink/renderer/modules/media_controls/media_controls_impl.cc