Added tests to previously broken functionality and added null checks.

sdk/lib/web_gl/dart2js/web_gl_dart2js.dart

Index: sdk/lib/web_gl/dart2js/web_gl_dart2js.dart
diff --git a/sdk/lib/web_gl/dart2js/web_gl_dart2js.dart b/sdk/lib/web_gl/dart2js/web_gl_dart2js.dart
index de46851ff2d9a7c072418b30fd28df2557defffb..37b811c9b31aaee9e104e68d3f540b68787cb1d9 100644
--- a/sdk/lib/web_gl/dart2js/web_gl_dart2js.dart
+++ b/sdk/lib/web_gl/dart2js/web_gl_dart2js.dart
@@ -2406,24 +2406,24 @@ class RenderingContext extends CanvasRenderingContext native "WebGLRenderingCont
   @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;
     }
@@ -2461,24 +2461,24 @@ class RenderingContext extends CanvasRenderingContext native "WebGLRenderingCont
   @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;
     }