Add foundation for trimming the AffiliationDatabase.

components/password_manager/core/browser/affiliation_database.cc

Index: components/password_manager/core/browser/affiliation_database.cc
diff --git a/components/password_manager/core/browser/affiliation_database.cc b/components/password_manager/core/browser/affiliation_database.cc
index 0757d711f339c90de27757c22a8af6ff35d70f6b..bab8f36642207db092188730dd226ce824b2932f 100644
--- a/components/password_manager/core/browser/affiliation_database.cc
+++ b/components/password_manager/core/browser/affiliation_database.cc
@@ -214,6 +214,12 @@ void AffiliationDatabase::StoreAndRemoveConflicting(
   transaction.Commit();
 }
 
+// static
+void AffiliationDatabase::Delete(const base::FilePath& path) {
+  bool success = sql::Connection::Delete(path);
+  DCHECK(success);
+}
+
 bool AffiliationDatabase::CreateTablesAndIndicesIfNeeded() {
   if (!sql_connection_->Execute(
           "CREATE TABLE IF NOT EXISTS eq_classes("