Things to unfork.

LayoutTests/dart/dom/InstanceOf.dart

-#import('../../../../../dart/client/testing/unittest/unittest.dart');
-#import('dart:dom');
-
-main() {
-  HTMLCanvasElement canvas;
-
-  // FIXME: remove when main is ran on content loaded.
-  window.setTimeout(() {
-    canvas = document.createElement('canvas');
-    canvas.setAttribute('width', '100');
-    canvas.setAttribute('height', '100');
-    document.body.appendChild(canvas);
-  }, 0);
-
-  forLayoutTests();
-  test('Instanceof', () {
-    Expect.isFalse(canvas is CanvasRenderingContext);
-    Expect.isFalse(canvas is CanvasRenderingContext2D);
-    Expect.isTrue(canvas is HTMLElement);
-    Expect.isTrue(canvas is HTMLCanvasElement);
-    Expect.isFalse(canvas is ImageData);
-    Expect.isFalse(canvas is CanvasPixelArray);
-
-    CanvasRenderingContext2D context = canvas.getContext('2d');
-    Expect.isTrue(context is CanvasRenderingContext);
-    Expect.isTrue(context is CanvasRenderingContext2D);
-    Expect.isFalse(context is HTMLElement);
-    Expect.isFalse(context is HTMLCanvasElement);
-    Expect.isFalse(context is ImageData);
-    Expect.isFalse(context is CanvasPixelArray);
-
-    // FIXME(b/5286633): Interface injection type check workaround.
-    var image = context.createImageData(canvas.width.dynamic, canvas.height.dynamic);
-    Expect.isFalse(image is CanvasRenderingContext);
-    Expect.isFalse(image is CanvasRenderingContext2D);
-    Expect.isFalse(image is HTMLElement);
-    Expect.isFalse(image is HTMLCanvasElement);
-    Expect.isTrue(image is ImageData);
-    Expect.isFalse(image is CanvasPixelArray);
-
-    // Include CanvasPixelArray since constructor and prototype are not
-    // available until one is created.
-    var bytes = image.data;
-    Expect.isFalse(bytes is CanvasRenderingContext);
-    Expect.isFalse(bytes is CanvasRenderingContext2D);
-    Expect.isFalse(bytes is HTMLElement);
-    Expect.isFalse(bytes is HTMLCanvasElement);
-    Expect.isFalse(bytes is ImageData);
-    Expect.isTrue(bytes is CanvasPixelArray);
-
-    // FIXME: Ensure this is an HTMLSpanElement when we next update
-    // WebKit IDL.
-    var span = document.createElement('span');
-    Expect.isTrue(span is HTMLElement);
-  });
-}