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..6e5d2ea17dec3463f28ac883db02bb8a5e7b29fc 100644
--- a/sdk/lib/web_gl/dart2js/web_gl_dart2js.dart
+++ b/sdk/lib/web_gl/dart2js/web_gl_dart2js.dart
@@ -2406,7 +2406,7 @@ 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]) {
-    if ((border_OR_canvas_OR_image_OR_pixels_OR_video is int || border_OR_canvas_OR_image_OR_pixels_OR_video == null)) {
+    if (format_OR_width != null && height_OR_type != null && (border_OR_canvas_OR_image_OR_pixels_OR_video is int || border_OR_canvas_OR_image_OR_pixels_OR_video == null) && pixels != null) {

[blois, 2013/05/14 01:47:56]

IDL has pixels as:
ArrayBufferView? pixels

Is it not nullable? (asking, I don't know what the ? means).

[Andrei Mouravski, 2013/05/14 01:58:56]

No idea, that was put in because pixels is optional.

[sra1, 2013/05/14 03:47:45]

I have seen some Blink IDL that has nullable parameters where w3 does not. 
Someone should ping someone in Blink to ask why.

[Anton Muhin, 2013/05/14 06:17:34]

? means nullable that is null is acceptable value.  We really need to check if
passing null and not passing an argument here is the same.

On 2013/05/14 01:58:56, Andrei Mouravski wrote:

[Andrei Mouravski, 2013/05/21 09:38:49]

Done.

       _texImage2D_1(target, level, internalformat, format_OR_width, height_OR_type, border_OR_canvas_OR_image_OR_pixels_OR_video, format, type, pixels);
       return;
     }
@@ -2461,7 +2461,7 @@ 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 (format_OR_width != null && height_OR_type != null && (canvas_OR_format_OR_image_OR_pixels_OR_video is int || canvas_OR_format_OR_image_OR_pixels_OR_video == null) && pixels != 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;
     }