Small: Implement CheckDownloadUrls -- not called yet.

components/safe_browsing_db/v4_protocol_manager_util.cc

Index: components/safe_browsing_db/v4_protocol_manager_util.cc
diff --git a/components/safe_browsing_db/v4_protocol_manager_util.cc b/components/safe_browsing_db/v4_protocol_manager_util.cc
index 3dfbaefbbb00ad9d7aff75c82a20c0d65ddd2671..b960ab23dffc583f5a08452837e0ecb86c50916d 100644
--- a/components/safe_browsing_db/v4_protocol_manager_util.cc
+++ b/components/safe_browsing_db/v4_protocol_manager_util.cc
@@ -93,6 +93,10 @@ const ListIdentifier GetUrlMalwareId() {
   return ListIdentifier(GetCurrentPlatformType(), URL, MALWARE_THREAT);
 }
 
+const ListIdentifier GetUrlMalBinId() {
+  return ListIdentifier(GetCurrentPlatformType(), URL, MALICIOUS_BINARY);
+}
+
 const ListIdentifier GetUrlSocEngId() {
   return ListIdentifier(GetCurrentPlatformType(), URL,
                         SOCIAL_ENGINEERING_PUBLIC);