Import wpt@5915964199b07226bf6d8fbb177a63b1f272907a

third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-offscreen-canvas/2d.canvas.readonly.worker.js

Index: third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-offscreen-canvas/2d.canvas.readonly.worker.js
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-offscreen-canvas/2d.canvas.readonly.worker.js b/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-offscreen-canvas/2d.canvas.readonly.worker.js
new file mode 100644
index 0000000000000000000000000000000000000000..f2d76f476c122a18cf7f8f05464cd8e5732b9f2f
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-offscreen-canvas/2d.canvas.readonly.worker.js
@@ -0,0 +1,23 @@
+// DO NOT EDIT! This test has been generated by tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.canvas.readonly
+// Description:canvas is readonly
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/common/canvas-tests.js");
+
+var t = async_test("canvas is readonly");
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.getContext('2d');
+
+var d = ctx.canvas;
+_assertDifferent(offscreenCanvas, d, "offscreenCanvas", "d");
+ctx.canvas = c;
+_assertSame(ctx.canvas, d, "ctx.canvas", "d");
+
+t.done();
+
+});
+done();