Move another set of extension tests to manifest_version 2

chrome/test/data/extensions/api_test/webglbackground/test.js

Index: chrome/test/data/extensions/api_test/webglbackground/test.js
===================================================================
--- chrome/test/data/extensions/api_test/webglbackground/test.js	(revision 0)
+++ chrome/test/data/extensions/api_test/webglbackground/test.js	(revision 0)
@@ -0,0 +1,10 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+chrome.test.runTests([
+  function checkForWebGL() {
+    chrome.test.assertEq(null, document.getElementsByTagName("canvas")[0].getContext("experimental-webgl"));
+    chrome.test.succeed();
+  }
+]);