Add Background Sync permission to page info bar

A recent patch (http://crrev.com/1735133002) added the desktop UI for
the background sync permission but did not add it to the page info bar.
This patch fixes this problem.

BUG=601012
TEST=manual (navigate to https://wicg.github.io/BackgroundSync/demo/,
see that background sync appears as a permission on infobar, change
settings, try registering sync).

Review URL: https://codereview.chromium.org/1863323003

Cr-Commit-Position: refs/heads/master@{#386063}
9 files changed