GitLab

Add browser proxy to give Scanning UI access to ScanningHandler
functions.

Bug: 1059779
Change-Id: Iad0f72305ae315c3079393ff077c784ec9b8f101
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2497427
Commit-Queue: Gavin Williams <gavinwill@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821831}