Removed READ_ONLY constants from IDBTransaction class

sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart

Index: sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart
diff --git a/sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart b/sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart
index ed55ba159f4d2badd5caf0b3e4e3b86f44d6dbf7..ad19e115fe4ec28de9f4890815d59964724eda44 100644
--- a/sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart
+++ b/sdk/lib/indexed_db/dart2js/indexed_db_dart2js.dart
@@ -213,12 +213,7 @@ class Database extends EventTarget native "*IDBDatabase" {
     // numeric mode tend to convert the string into a number.  This fails
     // silently, resulting in zero ('readonly').
     var txn = _transaction(storeName_OR_storeNames, mode);
-    if (_hasNumericMode(txn)) {
-      _transaction_fn = _transaction_numeric_mode;
-      txn = _transaction_fn(this, storeName_OR_storeNames, mode);
-    } else {
-      _transaction_fn = _transaction_string_mode;
-    }
+    _transaction_fn = _transaction_string_mode;
     return txn;
   }
 
@@ -226,13 +221,6 @@ class Database extends EventTarget native "*IDBDatabase" {
     return db._transaction(stores, mode);
   }
 
-  static Transaction _transaction_numeric_mode(Database db, stores, mode) {
-    int intMode;
-    if (mode == 'readonly') intMode = Transaction.READ_ONLY;
-    if (mode == 'readwrite') intMode = Transaction.READ_WRITE;
-    return db._transaction(stores, intMode);
-  }
-
   @JSName('transaction')
   Transaction _transaction(stores, mode) native;