Implement OffscreenCanvas.getContext('webgl')

third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-getContext2D-in-worker.html

Index: third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-getContext2D-in-worker.html
diff --git a/third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-getContext2D-in-worker.html b/third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-getContext2D-in-worker.html
index e555fa97de262f9322e8950a943ddb5a3c41e0bf..6d7a3420e2202ae916a464e0a174973ae25d573e 100644
--- a/third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-getContext2D-in-worker.html
+++ b/third_party/WebKit/LayoutTests/fast/canvas/OffscreenCanvas-getContext2D-in-worker.html
@@ -5,10 +5,14 @@
 <script id="myWorker" type="text/worker">
 self.onmessage = function(e) {
     var aCanvas = new OffscreenCanvas(50, 50);
+    var bCanvas = new OffscreenCanvas(50, 50);
     try {
-      var ctx = aCanvas.getContext('2d');
-      if (toString.call(ctx) != '[object OffscreenCanvasRenderingContext2D]') {
+      var ctx1 = aCanvas.getContext('2d');
+      var ctx2 = bCanvas.getContext('webgl');
+      if (toString.call(ctx1) != '[object OffscreenCanvasRenderingContext2D]') {
           self.postMessage("aCanvas.getContext('2d') does not return [object OffscreenCanvasRenderingContext2D]");
+      } else if (toString.call(ctx2) != 'object WebGLRenderingContext') {
+          self.postMessage("bCanvas.getContext('webgl') does not return [object WebGLRenderingContext]");

[Justin Novosad, 2016/04/20 20:07:27]

test is called "getContext2D" but it covers webgl too.

       } else {
           self.postMessage("success");
       }