Update app_list_metrics_unittest.cc to not use app_list.mojom

app_list.mojom is gone, so app_list_metrics_unittest.cc shouldn't try to
include this.

TBR=xiyuan

Bug: 958134
Change-Id: Iea03664ef6e46914f7561d26f99fdc9f6a50c3e0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1624009
Commit-Queue: Timothy Loh <timloh@chromium.org>
Reviewed-by: Timothy Loh <timloh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#662081}
1 file changed