SQLResultRowList.item converts row into map.

lib/dom/idl/dart/dart.idl

Index: lib/dom/idl/dart/dart.idl
diff --git a/lib/dom/idl/dart/dart.idl b/lib/dom/idl/dart/dart.idl
index afd3171b03bc65f56a0064136c8e3b7fe930c9d8..6cc04885fd1be713b70749d820edcd8d16f6ad36 100644
--- a/lib/dom/idl/dart/dart.idl
+++ b/lib/dom/idl/dart/dart.idl
@@ -283,3 +283,13 @@ module core {
         raises(DOMException);
   };
 }
+
+module storage {
+  [Supplemental]
+  interface SQLResultSetRowList {
+    // Change the return type to Dictionary so that rows are exposed in the Dart
+    // API as a Maps, with the appropriate conversion in JavaScript.
+    [Suppressed] DOMObject item(in unsigned long index);
+    [Custom] Dictionary item(in unsigned long index);
+  };
+}