Add the ability to check the CSD Whitelist asynchronously, for PhishGuard.

components/safe_browsing_db/test_database_manager.cc

Index: components/safe_browsing_db/test_database_manager.cc
diff --git a/components/safe_browsing_db/test_database_manager.cc b/components/safe_browsing_db/test_database_manager.cc
index 423097e13184a17c9b5cae195ad92a68b9c8492f..cdca0b0a628bd46fa18d98a9b8d0251349ba9e6e 100644
--- a/components/safe_browsing_db/test_database_manager.cc
+++ b/components/safe_browsing_db/test_database_manager.cc
@@ -66,6 +66,13 @@ bool TestSafeBrowsingDatabaseManager::CheckUrlForSubresourceFilter(
   return true;
 }
 
+AsyncMatch TestSafeBrowsingDatabaseManager::CheckCsdWhitelistUrl(
+    const GURL& url,
+    Client* client) {
+  NOTIMPLEMENTED();
+  return AsyncMatch::MATCH;
+}
+
 bool TestSafeBrowsingDatabaseManager::MatchCsdWhitelistUrl(const GURL& url) {
   NOTIMPLEMENTED();
   return true;