Add back unseparated out version of method overloads in dart:html.

tests/html/webgl_1_test.dart

 // Copyright (c) 2013, 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 web_gl_test;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:html';
 import 'dart:typed_data';
 import 'dart:web_gl';
@@ skipping 41 matching lines @@
 
         context = canvas.getContext3d(depth: false);
         expect(context, isNotNull);
         expect(context, new isInstanceOf<RenderingContext>());
       });
 
       test('texImage2D', () {
         var canvas = new CanvasElement();
         var context = canvas.getContext3d();
         var pixels = new Uint8List.fromList([0,0,3,255,0,0,0,0,0,0]);
-        context.texImage2D(1, 1, 1, 1, 10, 10, 1, 1, pixels);
+        context.texImage2DUntyped(1, 1, 1, 1, 10, 10, 1, 1, pixels);
 
         canvas = new CanvasElement();
         document.body.children.add(canvas);
         var context2 = canvas.getContext('2d');
         context.texImage2DData(1, 1, 1, 1, 10,
             context2.getImageData(10, 10, 10, 10));
 
         context.texImage2DImage(1, 1, 1, 1, 10, new ImageElement());
         context.texImage2DCanvas(1, 1, 1, 1, 10, new CanvasElement());
         context.texImage2DVideo(1, 1, 1, 1, 10, new VideoElement());
       });
 
       test('texSubImage2D', () {
         var canvas = new CanvasElement();
         var context = canvas.getContext3d();
         var pixels = new Uint8List.fromList([0,0,3,255,0,0,0,0,0,0]);
-        context.texSubImage2D(1, 1, 1, 1, 10, 10, 1, 1, pixels);
+        context.texSubImage2DUntyped(1, 1, 1, 1, 10, 10, 1, 1, pixels);
 
         canvas = new CanvasElement();
         document.body.children.add(canvas);
         var context2 = canvas.getContext('2d');
         context.texSubImage2DData(1, 1, 1, 1, 1, 10,
             context2.getImageData(10, 10, 10, 10));
 
         context.texSubImage2DImage(1, 1, 1, 1, 1, 10, new ImageElement());
         context.texSubImage2DCanvas(1, 1, 1, 1, 1, 10, new CanvasElement());
         context.texSubImage2DVideo(1, 1, 1, 1, 1, 10, new VideoElement());
       });
     }
   });
 }