Update Cloud Print code ownership.

Point various OWNERS files for Cloud Print code to //cloud_print/OWNERS.

Cq-Include-Trybots: luci.chromium.try:closure_compilation
Change-Id: I0ba92831f62904415c5d5f4ddf8fcf0335e301b8
Reviewed-on: https://chromium-review.googlesource.com/1141072Reviewed-by: Gabriel Charette <gab@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575798}

chrome/browser/local_discovery/OWNERS

-gene@chromium.org
-vitalybuka@chromium.org
+file://cloud_print/OWNERS
 
 # COMPONENT: Services>CloudPrint

chrome/browser/resources/cloud_print_app/OWNERS

-gene@chromium.org
-vitalybuka@chromium.org
+file://cloud_print/OWNERS
 
 # COMPONENT: Services>CloudPrint

chrome/browser/resources/local_discovery/OWNERS

-gene@chromium.org
-vitalybuka@chromium.org
+file://cloud_print/OWNERS
 
 # COMPONENT: Services>CloudPrint

chrome/browser/ui/webui/local_discovery/OWNERS

-gene@chromium.org
-vitalybuka@chromium.org
+file://cloud_print/OWNERS
 
 # COMPONENT: Services>CloudPrint

chrome/tools/service_discovery_sniffer/OWNERS

-gene@chromium.org
-vitalybuka@chromium.org
+file://cloud_print/OWNERS
 
 # COMPONENT: Services>CloudPrint