commit 8ffe7751ea81f5d0d571999eccf2e8461a552dff
author skau <skau@chromium.org> Wed Jun 29 02:10:28 2016
committer Commit bot <commit-bot@chromium.org> Wed Jun 29 02:13:20 2016
tree ec5362b8d0a5365c8119aa3b3d971f8384e9b07d
parent 709246a0f3afee77f19d056a6306d2f63b613fad

Enable the cups backend only when --enable-native-cups is specified.

CUPS printers will now be selectable in the print menus.

NOTE: This does not enable printing to said printers.

BUG=607668

TEST=Launch chrome with --enable-native-cups flag, open print preview,
change printers.  See that CUPS printers are listed as available
printers.

Review-Url: https://codereview.chromium.org/1934013002
Cr-Commit-Position: refs/heads/master@{#402654}