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This change causes all bookmark apps (including PWAs) which are not
marked as locally installed to always open in tabs. Apps are marked as
locally installed when they were not created on the machine but were
synced to the machine, unless the device is Chrome OS - where all apps
are marked as locally installed.

This change does not affect hosted apps.

Bug: 874841
Change-Id: Ia3936bb57e0fec94097fbf2925f676c97b703dc3
Reviewed-on: https://chromium-review.googlesource.com/1185336
Commit-Queue: Ben Wells <benwells@chromium.org>
Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#585813}