Rename dart:typeddata to dart:typed_data.

tests/html/typed_arrays_2_test.dart

 // 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.
 
 library TypedArrays2Test;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_config.dart';
 import 'dart:html';
-import 'dart:typeddata';
+import 'dart:typed_data';
 
 main() {
   useHtmlConfiguration();
 
   // Only perform tests if ArrayBuffer is supported.
   if (!Platform.supportsTypedData) {
     return;
   }
 
   test('viewTest_dynamic', () {
@@ skipping 57 matching lines @@
       expect(a2[14], 0x03020100);
 
       // OPTIONALS a2 = new Uint32List.view(a1.buffer, length: 30, byteOffset: 456);
       a2 = new Uint32List.view(a1.buffer, 456, 30);
       expect(a2.length, 30);
       expect(a2[0], 0xCBCAC9C8);
       expect(a2[1], 0xCFCECDCC);
       expect(a2[14], 0x03020100);
   });
 }