Add per-file owner for local_ntp_resources.grd

Bug: 864763
Change-Id: If3baac188ce07a4c2259b97b013353920b4ad3ba
Reviewed-on: https://chromium-review.googlesource.com/c/1329668Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Kyle Milka <kmilka@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607018}

chrome/browser/resources/OWNERS

 file://ui/webui/PLATFORM_OWNERS
 
 per-file component_extension_resources.grd=dgozman@chromium.org
+per-file local_ntp_resources.grd=file://components/search/OWNERS
 per-file profile_signin_confirmation*=achuith@chromium.org
 per-file snippets_internals*=file://components/ntp_snippets/OWNERS
 per-file sync_file_system_internals_resources.*=tzik@chromium.org