Modify blink type map to finalize lazily

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  * **Caution:** this specification is no longer actively maintained by the Web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.
  */
 library dart.dom.web_sql;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:_internal' hide deprecated;
 import 'dart:html';
 import 'dart:html_common';
 import 'dart:nativewrappers';
 import 'dart:_blink' as _blink;
 // DO NOT EDIT - unless you are editing documentation as per:
 // https://code.google.com/p/dart/wiki/ContributingHTMLDocumentation
 // Auto-generated dart:audio library.
 
 
 
 
 // FIXME: Can we make this private?
-const web_sqlBlinkMap = const {
-  'Database': SqlDatabase,
-  'SQLError': SqlError,
-  'SQLResultSet': SqlResultSet,
-  'SQLResultSetRowList': SqlResultSetRowList,
-  'SQLTransaction': SqlTransaction,
-  'SQLTransactionSync': _SQLTransactionSync,
+final web_sqlBlinkMap = {
+  'Database': () => SqlDatabase,
+  'SQLError': () => SqlError,
+  'SQLResultSet': () => SqlResultSet,
+  'SQLResultSetRowList': () => SqlResultSetRowList,
+  'SQLTransaction': () => SqlTransaction,
+  'SQLTransactionSync': () => _SQLTransactionSync,
 
 };
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // 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.
 
 
 @DomName('SQLStatementCallback')
@@ skipping 272 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"); }
 
 }