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This fixes the problem of the launcher closing after clicking on the\
app info drop down menu item on ChromeOS.

Note this CL partially reverts the mash changes made in
https://chromium-review.googlesource.com/c/chromium/src/+/897470

TEST=unit test + manually verified
BUG=987304

Change-Id: If92559f5d205d41db94c63aaf01090011552ff2f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1726756
Commit-Queue: Tim Song <tengs@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Trent Apted <tapted@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683426}