Update the background video optimization studies according to the new Finch config.

BUG=678663,703441

Review-Url: https://codereview.chromium.org/2835723002
Cr-Original-Commit-Position: refs/heads/master@{#466788}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: cd8a42eb0b92d101bd2ac1d7889fdb8500b8474c
1 file changed