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The struct contains two bitmaps for passthrough codecs' properties:
-- Supported bitstream codecs
-- A bit mask specifying which of the corresponding codecs support
   spatial rendering

This allows renderer process to get more information on passthrough
codecs from browser process.

Merge-with: eureka-internal/336787
Bug: internal b/139027108
Test: Build, unit test
Change-Id: I834ac35abc827bed9618b508e89209333e31afbc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1922981
Commit-Queue: Yuchen Liu <yucliu@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Sergey Volk <servolk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#719463}