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There is no need to pass the previous frame when only a few values are
needed. This will free space by allowing the previous frame to be freed
earlier.

BUG=946265
TEST=WebMediaPlayerMSTest content_unittests pass

Change-Id: I799a7d105c119760e440ca76c0b7b7cd82e4c524
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1601827
Commit-Queue: John Rummell <jrummell@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#660658}