Use local pages for webrtc telemetry tests.

tools/perf/page_sets/webrtc_cases/multiple-peerconnections.js

Index: tools/perf/page_sets/webrtc_cases/multiple-peerconnections.js
diff --git a/tools/perf/page_sets/webrtc_cases/multiple-peerconnections.js b/tools/perf/page_sets/webrtc_cases/multiple-peerconnections.js
new file mode 100644
index 0000000000000000000000000000000000000000..4401d10bd24937f23ce03c23a8a19e15137b583a
--- /dev/null
+++ b/tools/perf/page_sets/webrtc_cases/multiple-peerconnections.js
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2017 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.
+ */
+/*jshint esversion: 6 */
+
+'use strict';
+
+var $ = document.getElementById.bind(document);
+
+var testTable = $('test-table');
+var nPeerConnectionsInput = $('num-peerconnections');
+var startTestButton = $('start-test');
+var cpuOveruseDetectionCheckbox = $('cpuoveruse-detection');
+
+startTestButton.onclick = startTest;
+
+function logError(err) {
+  console.err(err);
+}
+
+function addNewVideoElement() {
+  var newRow = testTable.insertRow(-1);
+  var newCell = newRow.insertCell(-1);
+  var video = document.createElement('video');
+  video.autoplay = true;
+  newCell.appendChild(video);
+  return video;
+}
+
+function PeerConnection(id, cpuOveruseDetection) {
+  this.id = id;
+  this.cpuOveruseDetection = cpuOveruseDetection;
+
+  this.localConnection = null;
+  this.remoteConnection = null;
+
+  this.remoteView = addNewVideoElement();
+
+  this.start = function() {
+    var onGetUserMediaSuccess = this.onGetUserMediaSuccess.bind(this);
+    navigator.mediaDevices.getUserMedia({
+      audio: true,
+      video: true
+    })
+    .then(onGetUserMediaSuccess)
+    .catch(logError);
+  };
+
+  this.onGetUserMediaSuccess = function(stream) {
+    // Create local peer connection.
+    this.localConnection = new RTCPeerConnection(null, {
+      'optional': [{
+        'googCpuOveruseDetection': this.cpuOveruseDetection
+      }]
+    });
+    this.localConnection.onicecandidate = (event) => {
+      this.onIceCandidate(this.remoteConnection, event);
+    };
+    this.localConnection.addStream(stream);
+
+    // Create remote peer connection.
+    this.remoteConnection = new RTCPeerConnection(null, {
+      'optional': [{
+        'googCpuOveruseDetection': this.cpuOveruseDetection
+      }]
+    });
+    this.remoteConnection.onicecandidate = (event) => {
+      this.onIceCandidate(this.localConnection, event);
+    };
+    this.remoteConnection.onaddstream = (e) => {
+      this.remoteView.srcObject = e.stream;
+    };
+
+    // Initiate call.
+    var onCreateOfferSuccess = this.onCreateOfferSuccess.bind(this);
+    this.localConnection.createOffer({
+      offerToReceiveAudio: 1,
+      offerToReceiveVideo: 1
+    })
+    .then(onCreateOfferSuccess, logError);
+  };
+
+  this.onCreateOfferSuccess = function(desc) {
+    this.localConnection.setLocalDescription(desc);
+    this.remoteConnection.setRemoteDescription(desc);
+
+    var onCreateAnswerSuccess = this.onCreateAnswerSuccess.bind(this);
+    this.remoteConnection.createAnswer()
+    .then(onCreateAnswerSuccess, logError);
+  };
+
+  this.onCreateAnswerSuccess = function(desc) {
+    this.remoteConnection.setLocalDescription(desc);
+    this.localConnection.setRemoteDescription(desc);
+  };
+
+  this.onIceCandidate = function(connection, event) {
+    if (event.candidate) {
+      connection.addIceCandidate(new RTCIceCandidate(event.candidate));
+    }
+  };
+}
+
+function startTest() {
+  var cpuOveruseDetection = cpuOveruseDetectionCheckbox.checked;
+  var nPeerConnections = nPeerConnectionsInput.value;
+  for (var i = 0; i < nPeerConnections; ++i) {
+    new PeerConnection(i, cpuOveruseDetection).start();
+  }
+}