Convert RecordRemovedCallback to RepeatingCallback

Bug: 1007815
Change-Id: Ifee769d9f78a813e0540ffe007329a2246274e9b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2085212
Reviewed-by: Matt Menke <[email protected]>
Commit-Queue: Anna Malova <[email protected]>
Cr-Commit-Position: refs/heads/master@{#746789}
diff --git a/net/dns/mdns_cache.h b/net/dns/mdns_cache.h
index d1ea1c1..6e91a9c 100644
--- a/net/dns/mdns_cache.h
+++ b/net/dns/mdns_cache.h
@@ -50,7 +50,8 @@
     std::string optional_;
   };
 
-  typedef base::Callback<void(const RecordParsed*)> RecordRemovedCallback;
+  typedef base::RepeatingCallback<void(const RecordParsed*)>
+      RecordRemovedCallback;
 
   enum UpdateType {
     RecordAdded,