Mark ExtensionInstallListsMergeEnabled policy as future

Change-Id: I1b5b832520a192fddbc08c8046b12984b4557349
Bug: 953296
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1569747
Reviewed-by: Julian Pastarmov <pastarmovj@chromium.org>
Commit-Queue: Yann Dago <ydago@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#651706}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 62f8f7a64743bd3154ecd7960e715ae47c425855
1 file changed