Add per-file ownership for native WebsitePreferenceBridge

Change-Id: I4ed07473a67a8048ba77052fbc1e11681c0f8f1d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2144363
Auto-Submit: Natalie Chouinard <chouinard@chromium.org>
Reviewed-by: Andy Paicu <andypaicu@chromium.org>
Commit-Queue: Natalie Chouinard <chouinard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#759718}

chrome/browser/android/preferences/OWNERS

@@ -2,5 +2,6 @@ twellington@chromium.org
 chouinard@chromium.org
 
 per-file cookie_controls*=dullweber@chromium.org
+per-file website_preference_bridge.cc=file://chrome/android/java/src/org/chromium/chrome/browser/site_settings/OWNERS
 
 # COMPONENT: UI>Browser>Mobile>Settings