GitLab

This CL moves permission checking from device/usb/mojo directory to
chrome/browser/usb. This is a preparation step for moving device/usb
to service/device.

BUG=699790

Change-Id: Ic30d6ff94b670950fcb2571d7036dd7c0f39a24b
Reviewed-on: https://chromium-review.googlesource.com/1172154
Commit-Queue: Donna Wu <donna.wu@intel.com>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583979}