Remove ApplicationInitialization class.

It has a single method, confusing name, and provides little/no
value.  This just inlines the single method into the one call site.

BUG=876369

Change-Id: I8cc09dec289c14764563265e1da7ab41c5e74cf3
Reviewed-on: https://chromium-review.googlesource.com/c/1394928
Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Ted Choc <tedchoc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619862}
3 files changed