Split to SafeBrowsingDatabaseManager into Local* and Remote*.

build/config/BUILD.gn

Index: build/config/BUILD.gn
diff --git a/build/config/BUILD.gn b/build/config/BUILD.gn
index 22cb45ab9a955b95a91c67dfe0973f897cf06274..756d9d92f03e0175b697e4ab024be7dacfb002a4 100644
--- a/build/config/BUILD.gn
+++ b/build/config/BUILD.gn
@@ -237,6 +237,10 @@ config("feature_flags") {
   } else if (safe_browsing_mode == 2) {
     defines += [ "MOBILE_SAFE_BROWSING" ]
     defines += [ "SAFE_BROWSING_SERVICE" ]
+  } else if (safe_browsing_mode == 3) {
+    defines += [ "MOBILE_SAFE_BROWSING" ]
+    defines += [ "SAFE_BROWSING_DB_REMOTE" ]
+    defines += [ "SAFE_BROWSING_SERVICE" ]
   }
 }