Unbreak frog html tests

lib/dom/templates/html/frog/impl_IDBDatabase.darttemplate

Index: lib/dom/templates/html/frog/impl_IDBDatabase.darttemplate
diff --git a/lib/dom/templates/html/frog/impl_IDBDatabase.darttemplate b/lib/dom/templates/html/frog/impl_IDBDatabase.darttemplate
index efbc6a79c88f7554c2dd676d2fda4241f32b2c8a..900e0dda2e374486fc72c4fb4eec120844a06a94 100644
--- a/lib/dom/templates/html/frog/impl_IDBDatabase.darttemplate
+++ b/lib/dom/templates/html/frog/impl_IDBDatabase.darttemplate
@@ -29,8 +29,6 @@ class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
     return txn;
   }
 
-  static var _transaction_fn;  // Assigned one of the following:
-
   static _IDBTransactionImpl _transaction_string_mode($CLASSNAME db, stores, mode) {
     return db._transaction(stores, mode);
   }
@@ -47,3 +45,7 @@ class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
   static bool _hasNumericMode(txn) native 'return typeof(txn.mode) === "number"';
 
 $!MEMBERS}
+
+// TODO(sra): This should be a static member of _IDBTransactionImpl but frog
+// can't handle that.  Move it back after frog is completely done.
+var _transaction_fn;  // Assigned one of the static methods.