Make sure that classes in dart:html do not implement both List and List<E>.

sdk/lib/web_sql/dartium/web_sql_dartium.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  * **Caution:** this specification is no longer actively maintained by the Web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 194 matching lines @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // WARNING: Do not edit - generated code.
 
 
 @DocsEditable()
 @DomName('SQLResultSetRowList')
 // http://www.w3.org/TR/webdatabase/#sqlresultsetrowlist
 @Experimental() // deprecated
-class SqlResultSetRowList extends NativeFieldWrapperClass2 with ListMixin<Map>, ImmutableListMixin<Map> implements List {
+class SqlResultSetRowList extends NativeFieldWrapperClass2 with ListMixin<Map>, ImmutableListMixin<Map> implements List<Map> {
   // To suppress missing implicit constructor warnings.
   factory SqlResultSetRowList._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('SQLResultSetRowList.length')
   @DocsEditable()
   int get length native "SQLResultSetRowList_length_Getter";
 
   Map operator[](int index) {
     if (index < 0 || index >= length)
       throw new RangeError.range(index, 0, length);
@@ skipping 79 matching lines @@
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.SAFARI)
 @Experimental()
 // http://www.w3.org/TR/webdatabase/#sqltransactionsync
 @Experimental() // deprecated
 abstract class _SQLTransactionSync extends NativeFieldWrapperClass2 {
   // To suppress missing implicit constructor warnings.
   factory _SQLTransactionSync._() { throw new UnsupportedError("Not supported"); }
 
 }