Remove the legacy fullscreen video path in Android.
Remove the legacy fullscreen video path that was used before
html5 video controls were introduced. The last user was the
WebView, but this has been migrated to html5 controls now.
Committed:
https://crrev.com/62f3270dc28a7bccc7820ea9fb51f18fd4c74f6e
Cr-Commit-Position: refs/heads/master@{#296935}