Use registered users in google-breakpad/OWNERS.

AOSP project owners should be registered in Gerrit Code Review.

Bug: 33166666
Test: default build targets
Change-Id: If79ebcead89853524593862f7d90afdeb929d20a
diff --git a/OWNERS b/OWNERS
index 5f9a4ba..40a8287 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,3 +1,3 @@
 set noparent
-benchan@chromium.org
-vapier@chromium.org
+benchan@google.com
+vapier@google.com