The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ecb873387d0a01c8f057b449a4f5626cf5c978f8

commit ecb873387d0a01c8f057b449a4f5626cf5c978f8
Author: Becca Hughes <beccahughes@chromium.org>
Date: Tue Oct 24 16:48:29 2017

Media Controls: Bring CSS up to spec.

Bring the CSS for the modern media controls up to the spec from the UX
team and add the new icons.

BUG= 761313 , 761312 

Change-Id: Ia0ed41355e45117c3ce5d3f817a44ee9236fee28
Reviewed-on: https://chromium-review.googlesource.com/727938
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#511176}
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_100_percent/modern/ic_fullscreen.png
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_100_percent/modern/ic_fullscreen_exit.png
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_100_percent/modern/ic_menu.png
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_100_percent/modern/ic_pause.png
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_100_percent/modern/ic_play_arrow.png
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_100_percent/modern/ic_volume_off.png
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_100_percent/modern/ic_volume_up.png
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_200_percent/modern/ic_fullscreen.png
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_200_percent/modern/ic_fullscreen_exit.png
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_200_percent/modern/ic_menu.png
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_200_percent/modern/ic_pause.png
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_200_percent/modern/ic_play_arrow.png
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_200_percent/modern/ic_volume_off.png
[add] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/default_200_percent/modern/ic_volume_up.png
[modify] https://crrev.com/ecb873387d0a01c8f057b449a4f5626cf5c978f8/third_party/WebKit/Source/modules/media_controls/resources/modernMediaControls.css