gpu: Add WebGL robustness telemetry test

content/test/gpu/gpu_tests/webgl_robustness.py

Index: content/test/gpu/gpu_tests/webgl_robustness.py
diff --git a/content/test/gpu/gpu_tests/webgl_robustness.py b/content/test/gpu/gpu_tests/webgl_robustness.py
new file mode 100644
index 0000000000000000000000000000000000000000..f3ea32f63b059d457ef5e7bc795f34b07a9eef06
--- /dev/null
+++ b/content/test/gpu/gpu_tests/webgl_robustness.py
@@ -0,0 +1,64 @@
+# Copyright (c) 2013 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.
+from telemetry import test
+from telemetry.page import page_set
+from webgl_conformance import WebglConformanceValidator
+from webgl_conformance import conformance_harness_script
+from webgl_conformance import conformance_path
+
+
+robustness_harness_script = conformance_harness_script + r"""
+  var robustnessTestHarness = {};
+  robustnessTestHarness._contextLost = false;
+  robustnessTestHarness.initialize = function() {
+    var canvas = document.getElementById('example');
+    canvas.addEventListener('webglcontextlost', function() {
+      robustnessTestHarness._contextLost = true;
+    });
+  }
+  robustnessTestHarness.runTestLoop = function() {
+    // Run the test in a loop until the context is lost.
+    main();
+    if (!robustnessTestHarness._contextLost)
+      window.requestAnimationFrame(robustnessTestHarness.runTestLoop);
+    else
+      robustnessTestHarness.notifyFinished();
+  }
+  robustnessTestHarness.notifyFinished = function() {
+    // The test may fail in unpredictable ways depending on when the context is
+    // lost. We ignore such errors and only require that the browser doesn't
+    // crash.
+    webglTestHarness._allTestSucceeded = true;
+    // Notify test completion after a delay to make sure the browser is able to
+    // recover from the lost context.
+    setTimeout(webglTestHarness.notifyFinished, 3000);
+  }
+
+  window.confirm = function() {
+    robustnessTestHarness.initialize();
+    robustnessTestHarness.runTestLoop();
+    return false;
+  }
+  window.webglRobustnessTestHarness = robustnessTestHarness;
+"""
+
+
+class WebglRobustness(test.Test):
+  enabled = False
+  test = WebglConformanceValidator
+
+  def CreatePageSet(self, options):
+    page_set_dict = {
+      'description': 'Test cases for WebGL robustness',
+      'user_agent_type': 'desktop',
+      'serving_dirs': [''],
+      'pages': [
+        {
+          'url': 'file:///extra/lots-of-polys-example.html',
+          'script_to_evaluate_on_commit': robustness_harness_script,
+          'wait_for_javascript_expression': 'webglTestHarness._finished'
+        }
+      ]
+    }
+    return page_set.PageSet.FromDict(page_set_dict, conformance_path)