GitLab

- Update cdm type converters to support high bit depth video formats.
- Update ClearKeyCdm to support more video formats.
- Add a new MojoSharedBufferVideoFrameTest to test high bit depth video
  frames.
- Add a browser test to test end-to-end playback of encrypted 10-bit VP9
  video.

Bug: 707127
Test: New tests added.
Change-Id: I2459454a36b44c0427458c903237d3872acfaa54
Reviewed-on: https://chromium-review.googlesource.com/c/1261970
Commit-Queue: Xiaohan Wang <xhwang@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: John Rummell <jrummell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#597366}