GitLab

Modify WebApps to call WebAppLaunchManager API OpenApplication directly
to launch apps.

BUG=1061843

Change-Id: I5f5e165929b31f9cc55a5f0d466a30a24b8fbaf6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2115251
Commit-Queue: Nancy Wang <nancylingwang@chromium.org>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#752746}