Revert "Make CanvasPixelArray pretent to be Uint8ClampedArray"

client/tests/client/html/CanvasPixelArrayTypeAliasTest.dart

Index: client/tests/client/html/CanvasPixelArrayTypeAliasTest.dart
diff --git a/client/tests/client/html/CanvasPixelArrayTypeAliasTest.dart b/client/tests/client/html/CanvasPixelArrayTypeAliasTest.dart
deleted file mode 100644
index 96353a4e6da2127b4cfdc9654e2daa7a73df23e9..0000000000000000000000000000000000000000
--- a/client/tests/client/html/CanvasPixelArrayTypeAliasTest.dart
+++ /dev/null
@@ -1,62 +0,0 @@
-#library('CanvasTest');
-#import('../../../../lib/unittest/unittest.dart');
-#import('../../../../lib/unittest/html_config.dart');
-#import('dart:html');
-
-// We have aliased the legacy type CanvasPixelArray with the new type
-// Uint8ClampedArray by mapping the CanvasPixelArray type tag to
-// Uint8ClampedArray.  It is not a perfect match since CanvasPixelArray is
-// missing the ArrayBufferView members.  These should appear to be null.
-
-Object confuseType(x) => [1, x, [x], 's'] [1];
-
-main() {
-  CanvasElement canvas;
-  CanvasRenderingContext2D context;
-  int width = 100;
-  int height = 100;
-
-  canvas = new Element.tag('canvas');
-  canvas.width = width;
-  canvas.height = height;
-  document.body.nodes.add(canvas);
-
-  context = canvas.getContext('2d');
-
-  useHtmlConfiguration();
-
-  test('CreateImageData', () {
-    ImageData image = context.createImageData(canvas.width,
-                                              canvas.height);
-    Uint8ClampedArray data = image.data;
-    // It is legal for the dart2js compiler to believe the type of the native
-    // ImageData.data and elides the check, so check the type explicitly:
-    Expect.isTrue(confuseType(data) is Uint8ClampedArray);
-
-    Expect.equals(40000, data.length);
-    checkPixel(data, 0, [0, 0, 0, 0]);
-    checkPixel(data, width * height - 1, [0, 0, 0, 0]);
-
-    data[100] = 200;
-    Expect.equals(200, data[100]);
-  });
-
-  test('PutImageData', () {
-    ImageData data = context.getImageData(0, 0, width, height);
-    data.data[0] = 25;
-    data.data[3] = 255;
-    context.putImageData(data, 0, 0);
-
-    data = context.getImageData(0, 0, width, height);
-    Expect.equals(25, data.data[0]);
-    Expect.equals(255, data.data[3]);
-  });
-}
-
-void checkPixel(Uint8ClampedArray data, int offset, List<int> rgba)
-{
-  offset *= 4;
-  for (var i = 0; i < 4; ++i) {
-    Expect.equals(rgba[i], data[offset + i]);
-  }
-}