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/cpu_memory_script.js

+/**
+ * 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.
+ *
+ * @fileoverview Script to interact with test extension to get CPU/memory usage.
+ *
+ */
+
+
+// MR test extension ID.
+var extensionId = 'ocihafebdemjoofhbdnamghkfobfgbal';
+
+/**
+ * The dictionary to store the performance results with the following format:
+ * key: the metric, e.g. CPU, private memory
+ * value: map of the performance results for different processes.
+ *    key: process type, e.g. tab, browser, gpu, extension.
+ *    value: list of the performance results.
+ */
+window.perfResults = {};
+
+/**
+ * Connects to the test extension and starts to collect CPU/memory usage data.
+ */
+function collectPerfData() {
+  processCpuPort_ = openPort_('collectData');
+  if (processCpuPort_) {
+    processCpuPort_.onMessage.addListener(function(message) {
+      for (metric in message) {
+        if (!window.perfResults[metric]) {
+          window.perfResults[metric] = {};
+        }
+        for (process_type in message[metric]) {
+          if (!window.perfResults[metric][process_type]) {
+            window.perfResults[metric][process_type] = []
+          }
+          window.perfResults[metric][process_type].push(
+            message[metric][process_type]);
+        }
+      }
+    });
+  } else {
+    console.log('Unable to connect to port');
+  }
+}
+
+function openPort_(name) {
+  var rt = window.chrome.runtime;
+  if (rt && rt.connect) {
+    console.info('Opening port named ' + name);
+    return rt.connect(extensionId, {'name': name});
+  }
+  return null;
+}