Add offscreen-canvas to the list of wpt directories to skip.

third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/path-objects/2d.path.arc.end.worker.js

Index: third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/path-objects/2d.path.arc.end.worker.js
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/path-objects/2d.path.arc.end.worker.js b/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/path-objects/2d.path.arc.end.worker.js
deleted file mode 100644
index 3782a6d82cfb112503a7500d7a1ebbc17e40dc28..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/path-objects/2d.path.arc.end.worker.js
+++ /dev/null
@@ -1,29 +0,0 @@
-// DO NOT EDIT! This test has been generated by tools/gentest.py.
-// OffscreenCanvas test in a worker:2d.path.arc.end
-// Description:arc() adds the end point of the arc to the subpath
-// Note:
-
-importScripts("/resources/testharness.js");
-importScripts("/common/canvas-tests.js");
-
-var t = async_test("arc() adds the end point of the arc to the subpath");
-t.step(function() {
-
-var offscreenCanvas = new OffscreenCanvas(100, 50);
-var ctx = offscreenCanvas.getContext('2d');
-
-ctx.fillStyle = '#f00';
-ctx.fillRect(0, 0, 100, 50);
-ctx.lineWidth = 50;
-ctx.strokeStyle = '#0f0';
-ctx.beginPath();
-ctx.moveTo(-100, 0);
-ctx.arc(-100, 0, 25, -Math.PI/2, Math.PI/2, true);
-ctx.lineTo(100, 25);
-ctx.stroke();
-_assertPixel(offscreenCanvas, 50,25, 0,255,0,255, "50,25", "0,255,0,255");
-
-t.done();
-
-});
-done();