Added tests to previously broken functionality and added null checks.

sdk/lib/web_gl/dart2js/web_gl_dart2js.dart

 library dart.dom.web_gl;
 
 import 'dart:collection';
 import 'dart:_collection-dev';
 import 'dart:html';
 import 'dart:html_common';
 import 'dart:typed_data';
 import 'dart:_js_helper' show Creates, JSName, Null, Returns, convertDartClosureToJS;
 import 'dart:_foreign_helper' show JS;
 import 'dart:_interceptors' show Interceptor;
@@ skipping 2387 matching lines @@
   @DomName('WebGLRenderingContext.stencilOp')
   @DocsEditable
   void stencilOp(int fail, int zfail, int zpass) native;
 
   @DomName('WebGLRenderingContext.stencilOpSeparate')
   @DocsEditable
   void stencilOpSeparate(int face, int fail, int zfail, int zpass) native;
 
   @DomName('WebGLRenderingContext.texImage2D')
   @DocsEditable
   void texImage2D(int target, int level, int internalformat, int format_OR_width, int height_OR_type, border_OR_canvas_OR_image_OR_pixels_OR_video, [int format, int type, TypedData pixels]) {

[blois, 2013/05/13 21:09:16]

Which reminds me, would be great to fix
https://code.google.com/p/dart/issues/detail?id=8489.

These are just senseless overloads.

-    if ((border_OR_canvas_OR_image_OR_pixels_OR_video is int || border_OR_canvas_OR_image_OR_pixels_OR_video == null)) {
+    if (pixels != null && border_OR_canvas_OR_image_OR_pixels_OR_video is int && border_OR_canvas_OR_image_OR_pixels_OR_video != null && height_OR_type != null && format_OR_width != null) {
       _texImage2D_1(target, level, internalformat, format_OR_width, height_OR_type, border_OR_canvas_OR_image_OR_pixels_OR_video, format, type, pixels);
       return;
     }
-    if ((border_OR_canvas_OR_image_OR_pixels_OR_video is ImageData || border_OR_canvas_OR_image_OR_pixels_OR_video == null) && !?format && !?type && !?pixels) {
+    if (border_OR_canvas_OR_image_OR_pixels_OR_video is ImageData && border_OR_canvas_OR_image_OR_pixels_OR_video != null && !?format && !?type && !?pixels) {
       var pixels_1 = _convertDartToNative_ImageData(border_OR_canvas_OR_image_OR_pixels_OR_video);
       _texImage2D_2(target, level, internalformat, format_OR_width, height_OR_type, pixels_1);
       return;
     }
-    if ((border_OR_canvas_OR_image_OR_pixels_OR_video is ImageElement || border_OR_canvas_OR_image_OR_pixels_OR_video == null) && !?format && !?type && !?pixels) {
+    if (border_OR_canvas_OR_image_OR_pixels_OR_video is ImageElement && border_OR_canvas_OR_image_OR_pixels_OR_video != null && !?format && !?type && !?pixels) {
       _texImage2D_3(target, level, internalformat, format_OR_width, height_OR_type, border_OR_canvas_OR_image_OR_pixels_OR_video);
       return;
     }
-    if ((border_OR_canvas_OR_image_OR_pixels_OR_video is CanvasElement || border_OR_canvas_OR_image_OR_pixels_OR_video == null) && !?format && !?type && !?pixels) {
+    if (border_OR_canvas_OR_image_OR_pixels_OR_video is CanvasElement && border_OR_canvas_OR_image_OR_pixels_OR_video != null && !?format && !?type && !?pixels) {
       _texImage2D_4(target, level, internalformat, format_OR_width, height_OR_type, border_OR_canvas_OR_image_OR_pixels_OR_video);
       return;
     }
-    if ((border_OR_canvas_OR_image_OR_pixels_OR_video is VideoElement || border_OR_canvas_OR_image_OR_pixels_OR_video == null) && !?format && !?type && !?pixels) {
+    if (border_OR_canvas_OR_image_OR_pixels_OR_video is VideoElement && border_OR_canvas_OR_image_OR_pixels_OR_video != null && !?format && !?type && !?pixels) {
       _texImage2D_5(target, level, internalformat, format_OR_width, height_OR_type, border_OR_canvas_OR_image_OR_pixels_OR_video);
       return;
     }
     throw new ArgumentError("Incorrect number or type of arguments");
   }
   @JSName('texImage2D')
   @DomName('WebGLRenderingContext.texImage2D')
   @DocsEditable
   void _texImage2D_1(target, level, internalformat, width, height, int border, format, type, TypedData pixels) native;
   @JSName('texImage2D')
@@ skipping 17 matching lines @@
   @DocsEditable
   void texParameterf(int target, int pname, num param) native;
 
   @DomName('WebGLRenderingContext.texParameteri')
   @DocsEditable
   void texParameteri(int target, int pname, int param) native;
 
   @DomName('WebGLRenderingContext.texSubImage2D')
   @DocsEditable
   void texSubImage2D(int target, int level, int xoffset, int yoffset, int format_OR_width, int height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video, [int type, TypedData pixels]) {
-    if ((canvas_OR_format_OR_image_OR_pixels_OR_video is int || canvas_OR_format_OR_image_OR_pixels_OR_video == null)) {
+    if (pixels != null && canvas_OR_format_OR_image_OR_pixels_OR_video is int && height_OR_type != null && format_OR_width != null) {
       _texSubImage2D_1(target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video, type, pixels);
       return;
     }
-    if ((canvas_OR_format_OR_image_OR_pixels_OR_video is ImageData || canvas_OR_format_OR_image_OR_pixels_OR_video == null) && !?type && !?pixels) {
+    if (canvas_OR_format_OR_image_OR_pixels_OR_video is ImageData && canvas_OR_format_OR_image_OR_pixels_OR_video != null && !?type && !?pixels) {
       var pixels_1 = _convertDartToNative_ImageData(canvas_OR_format_OR_image_OR_pixels_OR_video);
       _texSubImage2D_2(target, level, xoffset, yoffset, format_OR_width, height_OR_type, pixels_1);
       return;
     }
-    if ((canvas_OR_format_OR_image_OR_pixels_OR_video is ImageElement || canvas_OR_format_OR_image_OR_pixels_OR_video == null) && !?type && !?pixels) {
+    if (canvas_OR_format_OR_image_OR_pixels_OR_video is ImageElement && canvas_OR_format_OR_image_OR_pixels_OR_video != null && !?type && !?pixels) {
       _texSubImage2D_3(target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video);
       return;
     }
-    if ((canvas_OR_format_OR_image_OR_pixels_OR_video is CanvasElement || canvas_OR_format_OR_image_OR_pixels_OR_video == null) && !?type && !?pixels) {
+    if (canvas_OR_format_OR_image_OR_pixels_OR_video is CanvasElement && canvas_OR_format_OR_image_OR_pixels_OR_video != null && !?type && !?pixels) {
       _texSubImage2D_4(target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video);
       return;
     }
-    if ((canvas_OR_format_OR_image_OR_pixels_OR_video is VideoElement || canvas_OR_format_OR_image_OR_pixels_OR_video == null) && !?type && !?pixels) {
+    if (canvas_OR_format_OR_image_OR_pixels_OR_video is VideoElement && canvas_OR_format_OR_image_OR_pixels_OR_video != null && !?type && !?pixels) {
       _texSubImage2D_5(target, level, xoffset, yoffset, format_OR_width, height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video);
       return;
     }
     throw new ArgumentError("Incorrect number or type of arguments");
   }
   @JSName('texSubImage2D')
   @DomName('WebGLRenderingContext.texSubImage2D')
   @DocsEditable
   void _texSubImage2D_1(target, level, xoffset, yoffset, width, height, int format, type, TypedData pixels) native;
   @JSName('texSubImage2D')
@@ skipping 187 matching lines @@
 }
 // 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.
 
 
 @DocsEditable
 @DomName('WebGLVertexArrayObjectOES')
 class VertexArrayObject native "WebGLVertexArrayObjectOES" {
 }