Cherry-pick: Hide fullscreen button when fullscreen not supported.

NOTE: this cherry-pick will only be landed after
https://googleplex-android-review.git.corp.google.com/#/c/523938/

BUG=400333

Review URL: https://codereview.chromium.org/442603006

git-svn-id: svn://svn.chromium.org/blink/trunk@179633 bbb929c8-8fbe-4397-9dbb-9b2b20218538

Conflicts:
	LayoutTests/media/video-controls-fullscreen.js

Change-Id: I806815e693f10703eea832ed030579775ecd0f2e
2 files changed