Add field trial testing config for msbb hints fetching

Also deletes config for ContextMenuPerformanceHints

Bug: 1005279
Change-Id: Ia4aab90da7cd1351f69541959b2fdc59cfbbeec9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2841894
Reviewed-by: Josh Simmons <jds@google.com>
Commit-Queue: Sophie Chang <sophiechang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#874829}
GitOrigin-RevId: efea5fcab1cb9f520ca3a9a6ca47e52d531e297b
1 file changed