Start unification of overload dispatcher generation.

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index 3b3087051f058ec95981ee4659fb6fc2c1054d53..5da1bdfb5b877687ba9ba83831c2a3a3588f7590 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -1008,12 +1008,12 @@ class CanvasRenderingContext2D extends CanvasRenderingContext native "*CanvasRen
 
   /// @domName CanvasRenderingContext2D.createImageData; @docsEditable true
   ImageData createImageData(imagedata_OR_sw, [num sh]) {
-    if ((?imagedata_OR_sw && (imagedata_OR_sw is ImageData || imagedata_OR_sw == null)) &&
+    if ((imagedata_OR_sw is ImageData || imagedata_OR_sw == null) &&
         !?sh) {
       var imagedata_1 = _convertDartToNative_ImageData(imagedata_OR_sw);
       return _convertNativeToDart_ImageData(_createImageData_1(imagedata_1));
     }
-    if ((?imagedata_OR_sw && (imagedata_OR_sw is num || imagedata_OR_sw == null))) {
+    if ((imagedata_OR_sw is num || imagedata_OR_sw == null)) {
       return _convertNativeToDart_ImageData(_createImageData_2(imagedata_OR_sw, sh));
     }
     throw new ArgumentError("Incorrect number or type of arguments");
@@ -19780,11 +19780,11 @@ class WebGLRenderingContext extends CanvasRenderingContext native "*WebGLRenderi
 
   /// @domName WebGLRenderingContext.texImage2D; @docsEditable true
   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, ArrayBufferView pixels]) {
-    if ((?border_OR_canvas_OR_image_OR_pixels_OR_video && (border_OR_canvas_OR_image_OR_pixels_OR_video is int || border_OR_canvas_OR_image_OR_pixels_OR_video == null))) {
+    if ((border_OR_canvas_OR_image_OR_pixels_OR_video is int || border_OR_canvas_OR_image_OR_pixels_OR_video == 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 && (border_OR_canvas_OR_image_OR_pixels_OR_video is ImageData || border_OR_canvas_OR_image_OR_pixels_OR_video == null)) &&
+    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) {
@@ -19792,21 +19792,21 @@ class WebGLRenderingContext extends CanvasRenderingContext native "*WebGLRenderi
       _texImage2D_2(target, level, internalformat, format_OR_width, height_OR_type, pixels_1);
       return;
     }
-    if ((?border_OR_canvas_OR_image_OR_pixels_OR_video && (border_OR_canvas_OR_image_OR_pixels_OR_video is ImageElement || border_OR_canvas_OR_image_OR_pixels_OR_video == null)) &&
+    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 && (border_OR_canvas_OR_image_OR_pixels_OR_video is CanvasElement || border_OR_canvas_OR_image_OR_pixels_OR_video == null)) &&
+    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 && (border_OR_canvas_OR_image_OR_pixels_OR_video is VideoElement || border_OR_canvas_OR_image_OR_pixels_OR_video == null)) &&
+    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) {
@@ -19834,30 +19834,30 @@ class WebGLRenderingContext extends CanvasRenderingContext native "*WebGLRenderi
 
   /// @domName WebGLRenderingContext.texSubImage2D; @docsEditable true
   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, ArrayBufferView pixels]) {
-    if ((?canvas_OR_format_OR_image_OR_pixels_OR_video && (canvas_OR_format_OR_image_OR_pixels_OR_video is int || canvas_OR_format_OR_image_OR_pixels_OR_video == null))) {
+    if ((canvas_OR_format_OR_image_OR_pixels_OR_video is int || canvas_OR_format_OR_image_OR_pixels_OR_video == 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 && (canvas_OR_format_OR_image_OR_pixels_OR_video is ImageData || canvas_OR_format_OR_image_OR_pixels_OR_video == null)) &&
+    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 && (canvas_OR_format_OR_image_OR_pixels_OR_video is ImageElement || canvas_OR_format_OR_image_OR_pixels_OR_video == null)) &&
+    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 && (canvas_OR_format_OR_image_OR_pixels_OR_video is CanvasElement || canvas_OR_format_OR_image_OR_pixels_OR_video == null)) &&
+    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 && (canvas_OR_format_OR_image_OR_pixels_OR_video is VideoElement || canvas_OR_format_OR_image_OR_pixels_OR_video == null)) &&
+    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);