Add List.insert.

sdk/lib/web_sql/dart2js/web_sql_dart2js.dart

 /**
  * An API for storing data in the browser that can be queried with SQL.
  *
  * **Caution:** this specification is no longer actively maintained by the Web
  * Applications Working Group and may be removed at any time.
  * See [the W3C Web SQL Database specification](http://www.w3.org/TR/webdatabase/)
  * for more information.
  *
  * The [dart:indexed_db] APIs is a recommended alternatives.
  */
@@ skipping 365 matching lines @@
     if (length == 0) throw new StateError("No elements");
     throw new StateError("More than one element");
   }
 
   Map min([int compare(Map a, Map b)]) =>
       IterableMixinWorkaround.min(this, compare);
 
   Map max([int compare(Map a, Map b)]) =>
       IterableMixinWorkaround.max(this, compare);
 
+  void insert(int index, Map element) {
+    throw new UnsupportedError("Cannot add to immutable List.");
+  }
+
   Map removeAt(int pos) {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
   Map removeLast() {
     throw new UnsupportedError("Cannot remove from immutable List.");
   }
 
   void remove(Object object) {
     throw new UnsupportedError("Cannot remove from immutable List.");
@@ skipping 72 matching lines @@
 @DomName('SQLTransactionSync')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental
 class SqlTransactionSync native "*SQLTransactionSync" {
 
   @DomName('SQLTransactionSync.executeSql')
   @DocsEditable
   SqlResultSet executeSql(String sqlStatement, List arguments) native;
 }