Introduce more fine-grained OWNERS

OWNERS

Index: OWNERS
diff --git a/OWNERS b/OWNERS
index 96d8d9c8051daa046c8906d27576809eb9ac98d7..7e92e78101223c0780e611d059bc219cdaa301e0 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,36 +1,8 @@
 abarth@chromium.org
-apavlov@chromium.org
-crogers@google.com
-darin@chromium.org
 dglazkov@chromium.org
-dimich@chromium.org
-dpranke@chromium.org
-eae@chromium.org
-enne@chromium.org
 eseidel@chromium.org
-esprehn@chromium.org
-hamaji@chromium.org
-haraken@chromium.org
-inferno@chromium.org
-jamesr@chromium.org
-japhet@chromium.org
-jchaffraix@chromium.org
-jianli@chromium.org
-jochen@chromium.org
-kbr@chromium.org
-levin@chromium.org
-leviw@chromium.org
-morrita@chromium.org
-ojan@chromium.org
-pdr@chromium.org
-pfeldman@chromium.org
-schenney@chromium.org
-senorblanco@chromium.org
-steveblock@chromium.org
-thakis@chromium.org
-tkent@chromium.org
-tony@chromium.org
-tonyg@chromium.org
-vsevik@chromium.org
-yurys@chromium.org
-yutak@chromium.org
+per-file .gitignore=*
+per-file DEPS=*
+per-file WATCHLISTS=*
+per-file PRESUBMIT*.py=dpranke@chromium.org
+per-file PRESUBMIT*.py=thakis@chromium.org