Remove unused sizing-tiny class and don't add sizing to audio controls

This CL removes the sizing-tiny breakpoint from the media controls,
since there are no CSS differences between the sizing-small and
sizing-tiny classes.

This CL also avoids setting the sizing-* classes on audio controls (and
video controls acting as audio controls) in order to avoid unwanted
CSS changes for the audio controls.

Bug: 839088
Change-Id: I3c9ba1119572d0b0f8bec6d8f6c261ff192c96f3
Reviewed-on: https://chromium-review.googlesource.com/1060281
Reviewed-by: Becca Hughes <beccahughes@chromium.org>
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#559189}
17 files changed