update the missing file in a2d9924c.
see https://chromium-review.googlesource.com/c/1470129

port 591408cb to mips.
see https://chromium-review.googlesource.com/c/1482915

Update the missing file in a4b19dcc.
see https://chromium-review.googlesource.com/c/1460474

Update the missing file in ad3546ab.
see https://chromium-review.googlesource.com/c/1434036

Fix compiler warnings.

Change-Id: Ie47b1d5aaa3c7f558def92255ce135b0fc0406ec
Reviewed-on: https://chromium-review.googlesource.com/c/1490995
Commit-Queue: Michael Hablich <hablich@chromium.org>
Reviewed-by: Predrag Rudic <prudic@wavecomp.com>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59963}