Use Manifest's orientation when creating a shortcut and as default orientation.

The orientation's value will be passed to the shortcut intent and will
then be used when trying to find out the default orientation.

BUG=366145
TBR=eseidel@chromium.org (for chrome/browser/DEPS change)

Review URL: https://codereview.chromium.org/579883002

Cr-Commit-Position: refs/heads/master@{#295498}
7 files changed