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* Rendering delay is not correctly calculated since it does not
  account for data buffered in the backend.
* Fixes sync issues with GPM Lyrics

Solution until crbug/988535 is fixed.

Bug: b/138451922
Change-Id: Ic7891995522870c7de8eb0f3975406e76b078a4e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1736805
Commit-Queue: Alex Leung <alexleung@google.com>
Reviewed-by: Yuchen Liu <yucliu@chromium.org>
Reviewed-by: John Rummell <jrummell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#690085}