Add new Telemetry tests to get CPU and memory usage for idle and flinging two test scenarios. Mirro…

chrome/test/media_router/telemetry/benchmarks/pagesets/media_router_page.py

+# Copyright 2016 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 os
+import time
+
+from telemetry import page
+from telemetry import story
+from telemetry.core import exceptions
+
+
+class CastPage(page.Page):
+  """Abstract Cast page for Media Router Telemetry tests."""
+
+  def ChooseSink(self, tab, sink_name):
+    """Chooses a specific sink in the list."""
+
+    tab.ExecuteJavaScript(
+      'var sinks = window.document.getElementById("media-router-container").'
+      '  shadowRoot.getElementById("sink-list").getElementsByTagName("span");'
+      'for (var i=0; i<sinks.length; i++) {'
+      '  if(sinks[i].textContent.trim() == "%s") {'
+      '    sinks[i].click();'
+      '    break;'
+      '}}' % sink_name);
+
+  def CloseDialog(self, tab):
+    """Closes media router dialog."""
+
+    try:
+      tab.ExecuteJavaScript(
+          'window.document.getElementById("media-router-container").' +
+          'shadowRoot.getElementById("container-header").shadowRoot.' +
+          'getElementById("close-button").click();')
+    except exceptions.DevtoolsTargetCrashException:
+      # Ignore the crash exception, this exception is caused by the js
+      # code which closes the dialog, it is expected.
+      pass
+
+  def ExecuteAsyncJavaScript(self, action_runner, script, verify_func,
+                             error_message, timeout=5):
+    """Executes async javascript function and waits until it finishes."""
+
+    action_runner.ExecuteJavaScript(script)
+    self._WaitForResult(action_runner, verify_func, error_message,
+                        timeout=timeout)
+
+  def _WaitForResult(self, action_runner, verify_func, error_message,
+                     timeout=5):
+    """Waits until the function finishes or timeout."""
+
+    start_time = time.time()
+    while (not verify_func() and
+           time.time() - start_time < timeout):
+      action_runner.Wait(1)
+    if not verify_func():
+      raise page.page_test.Failure(error_message)
+
+  def _GetDeviceName(self):
+    """Gets device name from environment variable RECEIVER_NAME."""
+    if 'RECEIVER_NAME' not in os.environ or not os.environ.get('RECEIVER_NAME'):
+      raise page.page_test.Failure(
+          'Your test machine is not set up correctly, '
+          'RECEIVER_NAME enviroment variable is missing.')
+    return os.environ.get('RECEIVER_NAME')