[IndexedRuleset] Improve worst-case domain list matching.

components/subresource_filter/core/common/flat/rules.fbs

Index: components/subresource_filter/core/common/flat/rules.fbs
diff --git a/components/subresource_filter/core/common/flat/rules.fbs b/components/subresource_filter/core/common/flat/rules.fbs
index 96c251a3bc92f056ce00909342ae68ca3ad13058..fdeaea972ee2eb8212f1d4c4e7e305f2a6ccf649 100644
--- a/components/subresource_filter/core/common/flat/rules.fbs
+++ b/components/subresource_filter/core/common/flat/rules.fbs
@@ -48,9 +48,8 @@ table UrlRule {
   anchor_right : AnchorType = NONE;
 
   // The list of domains to be included/excluded from the filter's affected set.
-  // If a particular string in the list starts with '~' then the respective
-  // domain is excluded, otherwise included.
-  domains : [string];
+  domains_included : [string];
+  domains_excluded : [string];
 
   // A URL pattern in the format defined by |url_pattern_type|.
   url_pattern : string;