WebRequest: Add jam@, cduvall@ as owners of web_request_proxying*.

BUG=None

Change-Id: I1de0000010a900843c87005d2786bd306435a259
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1656630
Auto-Submit: Karan Bhatia <karandeepb@chromium.org>
Reviewed-by: Clark DuVall <cduvall@chromium.org>
Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Karan Bhatia <karandeepb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#668600}

extensions/browser/api/web_request/OWNERS

@@ -1,4 +1,8 @@
 karandeepb@chromium.org
 battre@chromium.org
 
+# WebRequest + Network Service glue.
+per-file web_request_proxying*=cduvall@chromium.org
+per-file web_request_proxying*=jam@chromium.org
+
 # COMPONENT: Platform>Extensions>API