DIR_METADATA: Move metadata in //ash/search_box/OWNERS

Bug: 1113033
Change-Id: I99fb93e92022838f10fd03f1ffb4c795c8fa54de
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2593174
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Auto-Submit: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837186}

ash/search_box/DIR_METADATA

+monorail:  {
+  component:  "UI>Shell>Launcher"
+}

ash/search_box/OWNERS

 file://ash/app_list/OWNERS
-# COMPONENT: UI>Shell>Launcher