Fix texImage2D on Dartium.

sdk/lib/web_gl/dartium/web_gl_dartium.dart

 library dart.dom.web_gl;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:_collection-dev' hide deprecated;
 import 'dart:html';
 import 'dart:html_common';
 import 'dart:nativewrappers';
 import 'dart:typed_data';
 // DO NOT EDIT
@@ skipping 2775 matching lines @@
    *
    * [data] can be either an [ImageElement], a
    * [CanvasElement], a [VideoElement], or an [ImageData] object.
    *
    * To use [texImage2d] with a TypedData object, use [texImage2dTyped].
    *
    */
   @DomName('WebGLRenderingContext.texImage2D')
   void texImage2D(int targetTexture, int levelOfDetail, int internalFormat,
       int format, int type, data) {
-    _texImage2D(targetTexture, levelOfDetail, internalFormat,
-        format, type, data);
+    if (data is ImageElement) {
+      texImage2DImage(targetTexture, levelOfDetail, internalFormat, format,
+          type, data);
+    } else if (data is ImageData) {
+      texImage2DImageData(targetTexture, levelOfDetail, internalFormat, format,
+          type, data);
+    } else if (data is CanvasElement) {
+      texImage2DCanvas(targetTexture, levelOfDetail, internalFormat, format,
+          type, data);
+    } else {
+      texImage2DVideo(targetTexture, levelOfDetail, internalFormat, format,
+          type, data);
+    }
   }
 
   /**
    * Sets the currently bound texture to [data].
    */
   void texImage2DTyped(int targetTexture, int levelOfDetail, int internalFormat,
       int width, int height, int border, int format, int type, TypedData data) {
     _texImage2D(targetTexture, levelOfDetail, internalFormat,
         width, height, border, format, type, data);
   }
@@ skipping 91 matching lines @@
 // WARNING: Do not edit - generated code.
 
 
 @DocsEditable()
 @DomName('WebGLVertexArrayObjectOES')
 // http://www.khronos.org/registry/webgl/extensions/OES_vertex_array_object/
 @Experimental() // experimental
 class VertexArrayObject extends NativeFieldWrapperClass1 {
 
 }