Omnibox: Make most Omnibox OWNERS files link to components/omnibox/

This CL links many of the Omnibox OWNERS files together.

It also specifically adds location_bar to the Omnibox team's ownership
to lighten the review load on pkasting@.

Bug: NONE
Change-Id: I3b8b3a2e50dc2ad96d85e7b5fe02379b558e2bd0
Reviewed-on: https://chromium-review.googlesource.com/1091808
Commit-Queue: Tommy Li <tommycli@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565708}

chrome/browser/ui/location_bar/OWNERS

+file://components/omnibox/OWNERS
+
+# COMPONENT: UI>Browser>Omnibox

chrome/browser/ui/omnibox/OWNERS

-jdonnelly@chromium.org
-pkasting@chromium.org
-mpearson@chromium.org
-sky@chromium.org
-tommycli@chromium.org
+file://components/omnibox/OWNERS
 
 # COMPONENT: UI>Browser>Omnibox

chrome/browser/ui/views/location_bar/OWNERS

 estade@chromium.org
-pkasting@chromium.org
+file://components/omnibox/OWNERS
 
 # COMPONENT: UI>Browser>Omnibox

chrome/browser/ui/views/omnibox/OWNERS

-jdonnelly@chromium.org
-pkasting@chromium.org
-mpearson@chromium.org
-tommycli@chromium.org
+file://components/omnibox/OWNERS
 
 # COMPONENT: UI>Browser>Omnibox

components/omnibox/OWNERS

@@ -3,6 +3,4 @@ mpearson@chromium.org
 pkasting@chromium.org
 tommycli@chromium.org
 
-per-file clipboard_url_provider.*=jif@chromium.org
-
 # COMPONENT: UI>Browser>Omnibox

components/omnibox/browser/OWNERS

+per-file clipboard_url_provider.*=jif@chromium.org
+
+# COMPONENT: UI>Browser>Omnibox

components/omnibox_strings_grdp/OWNERS

 file://components/omnibox/OWNERS
+
+# COMPONENT: UI>Browser>Omnibox