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

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

Index: third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/path-objects/2d.path.rect.negative.worker.js
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/path-objects/2d.path.rect.negative.worker.js b/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/path-objects/2d.path.rect.negative.worker.js
deleted file mode 100644
index 4ee0b730fd2714de085f8ad9dd6d8113e0df8cc5..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/path-objects/2d.path.rect.negative.worker.js
+++ /dev/null
@@ -1,32 +0,0 @@
-// DO NOT EDIT! This test has been generated by tools/gentest.py.
-// OffscreenCanvas test in a worker:2d.path.rect.negative
-// Description:
-// Note:
-
-importScripts("/resources/testharness.js");
-importScripts("/common/canvas-tests.js");
-
-var t = async_test("");
-t.step(function() {
-
-var offscreenCanvas = new OffscreenCanvas(100, 50);
-var ctx = offscreenCanvas.getContext('2d');
-
-ctx.fillStyle = '#f00';
-ctx.fillRect(0, 0, 100, 50);
-ctx.beginPath();
-ctx.fillStyle = '#0f0';
-ctx.rect(0, 0, 50, 25);
-ctx.rect(100, 0, -50, 25);
-ctx.rect(0, 50, 50, -25);
-ctx.rect(100, 50, -50, -25);
-ctx.fill();
-_assertPixel(offscreenCanvas, 25,12, 0,255,0,255, "25,12", "0,255,0,255");
-_assertPixel(offscreenCanvas, 75,12, 0,255,0,255, "75,12", "0,255,0,255");
-_assertPixel(offscreenCanvas, 25,37, 0,255,0,255, "25,37", "0,255,0,255");
-_assertPixel(offscreenCanvas, 75,37, 0,255,0,255, "75,37", "0,255,0,255");
-
-t.done();
-
-});
-done();