Added test to check that GPU features are listed as hardware accelerated.

content/test/gpu/gpu_tests/accelerated.py

+# Copyright (c) 2012 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.
+import accelerated_expectations
+
+from telemetry import test
+from telemetry.page import page_set
+from telemetry.page import page_test
+
+test_harness_script = r"""
+  function VerifyHardwareAccelerated(feature) {
+    feature += ': '
+    var list = document.querySelector('.feature-status-list');
+    for (var i=0; i < list.childElementCount; i++) {
+      var span_list = list.children[i].getElementsByTagName('span');
+      var feature_str = span_list[0].textContent;
+      var value_str = span_list[1].textContent;
+      if ((feature_str == feature) &&
+          (value_str == 'Hardware accelerated')) {
+        return true;
+      }
+    }
+    return false;
+  };
+""";
+
+class AcceleratedValidator(page_test.PageTest):
+  def __init__(self):
+    super(AcceleratedValidator, self).__init__('ValidatePage')
+
+  def ValidatePage(self, page, tab, results):
+    feature = page.feature
+    if not tab.EvaluateJavaScript('VerifyHardwareAccelerated("%s")' % feature):
+      raise page_test.Failure('%s not hardware accelerated' % feature)
+
+def safe_feature_name(feature):
+  return feature.lower().replace(' ', '_')
+
+class Accelerated(test.Test):

[Ken Russell (switch to Gerrit), 2013/10/28 20:57:54]

Please choose a more descriptive name. CheckHardwareAcceleration,
CheckGPUAcceleration, ...

Also please consider whether the next tests you port will be able to go into the
same harness. Let's avoid adding separate steps for very similar tests.

+  """Tests GPU acceleration is reported as active"""
+  test = AcceleratedValidator
+
+  def CreateExpectations(self, page_set):
+    return accelerated_expectations.AcceleratedExpectations()
+
+  def CreatePageSet(self, options):
+    features = ['WebGL', 'Canvas', '3D CSS']
+
+    page_set_dict = {
+      'description': 'Tests GPU acceleration is reported as active',
+      'user_agent_type': 'desktop',
+      'pages': []
+    }
+
+    pages = page_set_dict['pages']
+
+    for feature in features:
+      pages.append({
+        'name': 'Accelerated.%s_accelerated' % safe_feature_name(feature),
+        'url': 'chrome://gpu',
+        'navigate_steps': [
+          { "action": 'navigate' }
+        ],
+        'script_to_evaluate_on_commit': test_harness_script,
+        'feature': feature
+      })
+
+    return page_set.PageSet.FromDict(page_set_dict, '')