Stop firing appinstalled when the user cancels a 3-dot menu install on desktop.

This CL addresses an issue where the appinstalled JavaScript event would
be fired if the user cancelled installing a PWA on desktop via the 3-dot
menu.

BUG=962845

Change-Id: Idae632bb4aefdff5d167aeb889076d8096e85c6e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1619522
Reviewed-by: Ben Wells <benwells@chromium.org>
Commit-Queue: Dominick Ng <dominickn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661660}
1 file changed