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

third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-canvas-state/2d.state.saverestore.stackdepth.worker.js

Index: third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-canvas-state/2d.state.saverestore.stackdepth.worker.js
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-canvas-state/2d.state.saverestore.stackdepth.worker.js b/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-canvas-state/2d.state.saverestore.stackdepth.worker.js
deleted file mode 100644
index 58a28e0ec8858c2fe28b68357307ce92d3f838b1..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/the-canvas-state/2d.state.saverestore.stackdepth.worker.js
+++ /dev/null
@@ -1,30 +0,0 @@
-// DO NOT EDIT! This test has been generated by tools/gentest.py.
-// OffscreenCanvas test in a worker:2d.state.saverestore.stackdepth
-// Description:save()/restore() stack depth is not unreasonably limited
-// Note:
-
-importScripts("/resources/testharness.js");
-importScripts("/common/canvas-tests.js");
-
-var t = async_test("save()/restore() stack depth is not unreasonably limited");
-t.step(function() {
-
-var offscreenCanvas = new OffscreenCanvas(100, 50);
-var ctx = offscreenCanvas.getContext('2d');
-
-var limit = 512;
-for (var i = 1; i < limit; ++i)
-{
-    ctx.save();
-    ctx.lineWidth = i;
-}
-for (var i = limit-1; i > 0; --i)
-{
-    _assertSame(ctx.lineWidth, i, "ctx.lineWidth", "i");
-    ctx.restore();
-}
-
-t.done();
-
-});
-done();