Cleaned up WebRTC browser test js, removed unneeded stuff.

chrome/test/data/webrtc/manual/peerconnection.js

Index: chrome/test/data/webrtc/manual/peerconnection.js
diff --git a/chrome/test/data/webrtc/manual/peerconnection.js b/chrome/test/data/webrtc/manual/peerconnection.js
deleted file mode 100644
index 3d7901f79e16ad2fbebd4a26697681abdb6622b3..0000000000000000000000000000000000000000
--- a/chrome/test/data/webrtc/manual/peerconnection.js
+++ /dev/null
@@ -1,1368 +0,0 @@
-/**
- * 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.
- */
-
- /**
- * See http://dev.w3.org/2011/webrtc/editor/getusermedia.html for more
- * information on getUserMedia. See
- * http://dev.w3.org/2011/webrtc/editor/webrtc.html for more information on
- * peerconnection and webrtc in general.
- */
-
-/** TODO(jansson) give it a better name
- * Global namespace object.
- */
-var global = {};
-
-/**
- * We need a STUN server for some API calls.
- * @private
- */
-var STUN_SERVER = 'stun.l.google.com:19302';
-
-/** @private */
-global.transformOutgoingSdp = function(sdp) { return sdp; };
-
-/** @private */
-global.dataStatusCallback = function(status) {};
-
-/** @private */
-global.dataCallback = function(data) {};
-
-/** @private */
-global.dtmfOnToneChange = function(tone) {};
-
-/**
- * Used as a shortcut for finding DOM elements by ID.
- * @param {string} id is a case-sensitive string representing the unique ID of
- *     the element being sought.
- * @return {object} id returns the element object specified as a parameter
- */
-$ = function(id) {
-  return document.getElementById(id);
-};
-
-/**
- * Prepopulate constraints from JS to the UI. Enumerate devices available
- * via getUserMedia, register elements to be used for local storage.
- */
-window.onload = function() {
-  hookupDataChannelCallbacks_();
-  hookupDtmfSenderCallback_();
-  updateGetUserMediaConstraints();
-  setupLocalStorageFieldValues();
-  acceptIncomingCalls();
-  if ($('get-devices-onload').checked == true) {
-    getDevices();
-  }
-};
-
-/**
- * Disconnect before the tab is closed.
- */
-window.onbeforeunload = function() {
-  disconnect_();
-};
-
-/** TODO Add element.id as a parameter and call this function instead?
- *  A list of element id's to be registered for local storage.
- */
-function setupLocalStorageFieldValues() {
-  registerLocalStorage_('pc-server');
-  registerLocalStorage_('pc-createanswer-constraints');
-  registerLocalStorage_('pc-createoffer-constraints');
-  registerLocalStorage_('get-devices-onload');
-  registerLocalStorage_('data-channel-type-rtp');
-}
-
-// Public HTML functions
-
-// The *Here functions are called from peerconnection.html and will make calls
-// into our underlying JavaScript library with the values from the page
-// (have to be named differently to avoid name clashes with existing functions).
-
-function getUserMediaFromHere() {
-  var constraints = $('getusermedia-constraints').value;
-  try {
-    doGetUserMedia_(constraints);
-  } catch (exception) {
-    print_('getUserMedia says: ' + exception);
-  }
-}
-
-function connectFromHere() {
-  var server = $('pc-server').value;
-  if ($('peer-id').value == '') {
-    // Generate a random name to distinguish us from other tabs:
-    $('peer-id').value = 'peer_' + Math.floor(Math.random() * 10000);
-    print_('Our name from now on will be ' + $('peer-id').value);
-  }
-  connect(server, $('peer-id').value);
-}
-
-function negotiateCallFromHere() {
-  // Set the global variables with values from our UI.
-  setCreateOfferConstraints(getEvaluatedJavaScript_(
-      $('pc-createoffer-constraints').value));
-  setCreateAnswerConstraints(getEvaluatedJavaScript_(
-      $('pc-createanswer-constraints').value));
-
-  ensureHasPeerConnection_();
-  negotiateCall_();
-}
-
-function addLocalStreamFromHere() {
-  ensureHasPeerConnection_();
-  addLocalStream();
-}
-
-function removeLocalStreamFromHere() {
-  removeLocalStream();
-}
-
-function hangUpFromHere() {
-  hangUp();
-  acceptIncomingCalls();
-}
-
-function toggleRemoteVideoFromHere() {
-  toggleRemoteStream(function(remoteStream) {
-    return remoteStream.getVideoTracks()[0];
-  }, 'video');
-}
-
-function toggleRemoteAudioFromHere() {
-  toggleRemoteStream(function(remoteStream) {
-    return remoteStream.getAudioTracks()[0];
-  }, 'audio');
-}
-
-function toggleLocalVideoFromHere() {
-  toggleLocalStream(function(localStream) {
-    return localStream.getVideoTracks()[0];
-  }, 'video');
-}
-
-function toggleLocalAudioFromHere() {
-  toggleLocalStream(function(localStream) {
-    return localStream.getAudioTracks()[0];
-  }, 'audio');
-}
-
-function stopLocalFromHere() {
-  stopLocalStream();
-}
-
-function createDataChannelFromHere() {
-  ensureHasPeerConnection_();
-  createDataChannelOnPeerConnection();
-}
-
-function closeDataChannelFromHere() {
-  ensureHasPeerConnection_();
-  closeDataChannelOnPeerConnection();
-}
-
-function sendDataFromHere() {
-  var data = $('data-channel-send').value;
-  sendDataOnChannel(data);
-}
-
-function createDtmfSenderFromHere() {
-  ensureHasPeerConnection_();
-  createDtmfSenderOnPeerConnection();
-}
-
-function insertDtmfFromHere() {
-  var tones = $('dtmf-tones').value;
-  var duration = $('dtmf-tones-duration').value;
-  var gap = $('dtmf-tones-gap').value;
-  insertDtmfOnSender(tones, duration, gap);
-}
-
-function forceIsacChanged() {
-  var forceIsac = $('force-isac').checked;
-  if (forceIsac) {
-    forceIsac_();
-  } else {
-    dontTouchSdp_();
-  }
-}
-
-/**
- * Updates the constraints in the getusermedia-constraints text box with a
- * MediaStreamConstraints string. This string is created based on the status of
- * the checkboxes for audio and video. If device enumeration is supported and
- * device source id's are not null they will be added to the constraints string.
- * Fetches the screen size using "screen" in Chrome as we need to pass a max
- * resolution else it defaults to 640x480 in the constraints for screen
- * capturing.
- */
-function updateGetUserMediaConstraints() {
-  var audioSelected = $('audiosrc');
-  var videoSelected = $('videosrc');
-  var constraints = {
-    audio: $('audio').checked,
-    video: $('video').checked
-  };
-
-  if (audioSelected.disabled == false && videoSelected.disabled == false) {
-    var devices = getSourcesFromField_(audioSelected, videoSelected);
-    if ($('audio').checked == true) {
-      if (devices.audioId != null) {
-        constraints.audio = {optional: [{sourceId: devices.audioId}]};
-      } else {
-        constraints.audio = true;
-      }
-    }
-    if ($('video').checked == true) {
-      // Default optional constraints placed here.
-      constraints.video = {optional: [{minWidth: $('video-width').value},
-                                      {minHeight: $('video-height').value},
-                                      {googCpuOveruseDetection: true},
-                                      {googLeakyBucket: true}]
-      };
-      if (devices.videoId != null) {
-        constraints.video.optional.push({sourceId: devices.videoId});
-      }
-    }
-  }
-
-  if ($('screencapture').checked) {
-    var constraints = {
-      audio: $('audio').checked,
-      video: {mandatory: {chromeMediaSource: 'screen',
-                          maxWidth: screen.width,
-                          maxHeight: screen.height}}
-    };
-    if ($('audio').checked == true)
-      print_('Audio for screencapture is not implemented yet, please ' +
-            'try to set audio = false prior requesting screencapture');
-  }
-  $('getusermedia-constraints').value = JSON.stringify(constraints, null, ' ');
-}
-
-function showServerHelp() {
-  alert('You need to build and run a peerconnection_server on some ' +
-        'suitable machine. To build it in chrome, just run make/ninja ' +
-        'peerconnection_server. Otherwise, read in https://code.google' +
-        '.com/searchframe#xSWYf0NTG_Q/trunk/peerconnection/README&q=REA' +
-        'DME%20package:webrtc%5C.googlecode%5C.com.');
-}
-
-function clearLog() {
-  $('messages').innerHTML = '';
-  $('debug').innerHTML = '';
-}
-
-/**
- * Stops the local stream.
- */
-function stopLocalStream() {
-  if (global.localStream == null)
-    error_('Tried to stop local stream, ' +
-           'but media access is not granted.');
-
-  global.localStream.stop();
-}
-
-/**
- * Adds the current local media stream to a peer connection.
- * @param {RTCPeerConnection} peerConnection
- */
-function addLocalStreamToPeerConnection(peerConnection) {
-  if (global.localStream == null)
-    error_('Tried to add local stream to peer connection, but there is no ' +
-           'stream yet.');
-  try {
-    peerConnection.addStream(global.localStream, global.addStreamConstraints);
-  } catch (exception) {
-    error_('Failed to add stream with constraints ' +
-           global.addStreamConstraints + ': ' + exception);
-  }
-  print_('Added local stream.');
-}
-
-/**
- * Removes the local stream from the peer connection.
- * @param {rtcpeerconnection} peerConnection
- */
-function removeLocalStreamFromPeerConnection(peerConnection) {
-  if (global.localStream == null)
-    error_('Tried to remove local stream from peer connection, but there is ' +
-           'no stream yet.');
-  try {
-    peerConnection.removeStream(global.localStream);
-  } catch (exception) {
-    error_('Could not remove stream: ' + exception);
-  }
-  print_('Removed local stream.');
-}
-
-/**
- * Enumerates the audio and video devices available in Chrome and adds the
- * devices to the HTML elements with Id 'audiosrc' and 'videosrc'.
- * Checks if device enumeration is supported and if the 'audiosrc' + 'videosrc'
- * elements exists, if not a debug printout will be displayed.
- * If the device label is empty, audio/video + sequence number will be used to
- * populate the name. Also makes sure the children has been loaded in order
- * to update the constraints.
- */
-function getDevices() {
-  var audio_select = $('audiosrc');
-  var video_select = $('videosrc');
-  var get_devices = $('get-devices');
-  audio_select.innerHTML = '';
-  video_select.innerHTML = '';
-  try {
-    eval(MediaStreamTrack.getSources(function() {}));
-  } catch (exception) {
-    audio_select.disabled = true;
-    video_select.disabled = true;
-    refresh_devices.disabled = true;
-    updateGetUserMediaConstraints();
-    error_('Device enumeration not supported. ' + exception);
-  }
-  MediaStreamTrack.getSources(function(devices) {
-    for (var i = 0; i < devices.length; i++) {
-      var option = document.createElement('option');
-      option.value = devices[i].id;
-      option.text = devices[i].label;
-      if (devices[i].kind == 'audio') {
-        if (option.text == '') {
-          option.text = devices[i].id;
-        }
-        audio_select.appendChild(option);
-      } else if (devices[i].kind == 'video') {
-        if (option.text == '') {
-          option.text = devices[i].id;
-        }
-        video_select.appendChild(option);
-      } else {
-        error_('Device type ' + devices[i].kind + ' not recognized, ' +
-                'cannot enumerate device. Currently only device types' +
-                '\'audio\' and \'video\' are supported');
-        updateGetUserMediaConstraints();
-        return;
-      }
-    }
-  });
-  checkIfDeviceDropdownsArePopulated_();
-}
-
-/**
- * Sets the transform to apply just before setting the local description and
- * sending to the peer.
- * @param {function} transformFunction A function which takes one SDP string as
- *     argument and returns the modified SDP string.
- */
-function setOutgoingSdpTransform(transformFunction) {
-  global.transformOutgoingSdp = transformFunction;
-}
-
-/**
- * Sets the MediaConstraints to be used for PeerConnection createAnswer() calls.
- * @param {string} mediaConstraints The constraints, as defined in the
- *     PeerConnection JS API spec.
- */
-function setCreateAnswerConstraints(mediaConstraints) {
-  global.createAnswerConstraints = mediaConstraints;
-}
-
-/**
- * Sets the MediaConstraints to be used for PeerConnection createOffer() calls.
- * @param {string} mediaConstraints The constraints, as defined in the
- *     PeerConnection JS API spec.
- */
-function setCreateOfferConstraints(mediaConstraints) {
-  global.createOfferConstraints = mediaConstraints;
-}
-
-/**
- * Sets the callback functions that will receive DataChannel readyState updates
- * and received data.
- * @param {function} status_callback The function that will receive a string
- * with
- *     the current DataChannel readyState.
- * @param {function} data_callback The function that will a string with data
- *     received from the remote peer.
- */
-function setDataCallbacks(status_callback, data_callback) {
-  global.dataStatusCallback = status_callback;
-  global.dataCallback = data_callback;
-}
-
-/**
- * Sends data on an active DataChannel.
- * @param {string} data The string that will be sent to the remote peer.
- */
-function sendDataOnChannel(data) {
-  if (global.dataChannel == null)
-    error_('Trying to send data, but there is no DataChannel.');
-  global.dataChannel.send(data);
-}
-
-/**
- * Sets the callback function that will receive DTMF sender ontonechange events.
- * @param {function} ontonechange The function that will receive a string with
- *     the tone that has just begun playout.
- */
-function setOnToneChange(ontonechange) {
-  global.dtmfOnToneChange = ontonechange;
-}
-
-/**
- * Inserts DTMF tones on an active DTMF sender.
- * @param {string} tones to be sent.
- * @param {string} duration duration of the tones to be sent.
- * @param {string} interToneGap gap between the tones to be sent.
- */
-function insertDtmf(tones, duration, interToneGap) {
-  if (global.dtmfSender == null)
-    error_('Trying to send DTMF, but there is no DTMF sender.');
-  global.dtmfSender.insertDTMF(tones, duration, interToneGap);
-}
-
-function handleMessage(peerConnection, message) {
-  var parsed_msg = JSON.parse(message);
-  if (parsed_msg.type) {
-    var session_description = new RTCSessionDescription(parsed_msg);
-    peerConnection.setRemoteDescription(
-        session_description,
-        function() { success_('setRemoteDescription'); },
-        function() { failure_('setRemoteDescription'); });
-    if (session_description.type == 'offer') {
-      print_('createAnswer with constraints: ' +
-            JSON.stringify(global.createAnswerConstraints, null, ' '));
-      peerConnection.createAnswer(
-        setLocalAndSendMessage_,
-        function() { failure_('createAnswer'); },
-        global.createAnswerConstraints);
-    }
-    return;
-  } else if (parsed_msg.candidate) {
-    var candidate = new RTCIceCandidate(parsed_msg);
-    peerConnection.addIceCandidate(candidate);
-    return;
-  }
-  error_('unknown message received');
-}
-
-function createPeerConnection(stun_server, useRtpDataChannels) {
-  servers = {iceServers: [{url: 'stun:' + stun_server}]};
-  try {
-    var constraints = { optional: [{ RtpDataChannels: useRtpDataChannels }]};
-    peerConnection = new webkitRTCPeerConnection(servers, constraints);
-  } catch (exception) {
-    error_('Failed to create peer connection: ' + exception);
-  }
-  peerConnection.onaddstream = addStreamCallback_;
-  peerConnection.onremovestream = removeStreamCallback_;
-  peerConnection.onicecandidate = iceCallback_;
-  peerConnection.ondatachannel = onCreateDataChannelCallback_;
-  return peerConnection;
-}
-
-function setupCall(peerConnection) {
-  print_('createOffer with constraints: ' +
-        JSON.stringify(global.createOfferConstraints, null, ' '));
-  peerConnection.createOffer(
-      setLocalAndSendMessage_,
-      function() { failure_('createOffer'); },
-      global.createOfferConstraints);
-}
-
-function answerCall(peerConnection, message) {
-  handleMessage(peerConnection, message);
-}
-
-function createDataChannel(peerConnection, label) {
-  if (global.dataChannel != null && global.dataChannel.readyState != 'closed')
-    error_('Creating DataChannel, but we already have one.');
-
-  global.dataChannel = peerConnection.createDataChannel(label,
-                                                        { reliable: false });
-  print_('DataChannel with label ' + global.dataChannel.label + ' initiated ' +
-         'locally.');
-  hookupDataChannelEvents();
-}
-
-function closeDataChannel(peerConnection) {
-  if (global.dataChannel == null)
-    error_('Closing DataChannel, but none exists.');
-  print_('DataChannel with label ' + global.dataChannel.label +
-         ' is beeing closed.');
-  global.dataChannel.close();
-}
-
-function createDtmfSender(peerConnection) {
-  if (global.dtmfSender != null)
-    error_('Creating DTMF sender, but we already have one.');
-
-  var localStream = global.localStream();
-  if (localStream == null)
-    error_('Creating DTMF sender but local stream is null.');
-  local_audio_track = localStream.getAudioTracks()[0];
-  global.dtmfSender = peerConnection.createDTMFSender(local_audio_track);
-  global.dtmfSender.ontonechange = global.dtmfOnToneChange;
-}
-
-/**
- * Connects to the provided peerconnection_server.
- *
- * @param {string} serverUrl The server URL in string form without an ending
- *     slash, something like http://localhost:8888.
- * @param {string} clientName The name to use when connecting to the server.
- */
-function connect(serverUrl, clientName) {
-  if (global.ourPeerId != null)
-    error_('connecting, but is already connected.');
-
-  print_('Connecting to ' + serverUrl + ' as ' + clientName);
-  global.serverUrl = serverUrl;
-  global.ourClientName = clientName;
-
-  request = new XMLHttpRequest();
-  request.open('GET', serverUrl + '/sign_in?' + clientName, true);
-  print_(serverUrl + '/sign_in?' + clientName);
-  request.onreadystatechange = function() {
-    connectCallback_(request);
-  };
-  request.send();
-}
-
-/**
- * Checks if the remote peer has connected. Returns peer-connected if that is
- * the case, otherwise no-peer-connected.
- */
-function remotePeerIsConnected() {
-  if (global.remotePeerId == null)
-    print_('no-peer-connected');
-  else
-    print_('peer-connected');
-}
-
-/**
- * Creates a peer connection. Must be called before most other public functions
- * in this file.
- */
-function preparePeerConnection() {
-  if (global.peerConnection != null)
-    error_('creating peer connection, but we already have one.');
-
-  global.peerConnection = createPeerConnection(STUN_SERVER,
-      $('data-channel-type-rtp').checked);
-  print_('ok-peerconnection-created');
-}
-
-/**
- * Adds the local stream to the peer connection. You will have to re-negotiate
- * the call for this to take effect in the call.
- */
-function addLocalStream() {
-  if (global.peerConnection == null)
-    error_('adding local stream, but we have no peer connection.');
-
-  addLocalStreamToPeerConnection(global.peerConnection);
-  print_('ok-added');
-}
-
-/**
- * Removes the local stream from the peer connection. You will have to
- * re-negotiate the call for this to take effect in the call.
- */
-function removeLocalStream() {
-  if (global.peerConnection == null)
-    error_('attempting to remove local stream, but no call is up');
-
-  removeLocalStreamFromPeerConnection(global.peerConnection);
-  print_('ok-local-stream-removed');
-}
-
-/**
- * (see getReadyState_)
- */
-function getPeerConnectionReadyState() {
-  print_(getReadyState_());
-}
-
-/**
- * Toggles the remote audio stream's enabled state on the peer connection, given
- * that a call is active. Returns ok-[typeToToggle]-toggled-to-[true/false]
- * on success.
- *
- * @param {function} selectAudioOrVideoTrack A function that takes a remote
- *     stream as argument and returns a track (e.g. either the video or audio
- *     track).
- * @param {function} typeToToggle Either "audio" or "video" depending on what
- *     the selector function selects.
- */
-function toggleRemoteStream(selectAudioOrVideoTrack, typeToToggle) {
-  if (global.peerConnection == null)
-    error_('Tried to toggle remote stream, but have no peer connection.');
-  if (global.peerConnection.getRemoteStreams().length == 0)
-    error_('Tried to toggle remote stream, but not receiving any stream.');
-
-  var track = selectAudioOrVideoTrack(
-      global.peerConnection.getRemoteStreams()[0]);
-  toggle_(track, 'remote', typeToToggle);
-}
-
-/**
- * See documentation on toggleRemoteStream (this function is the same except
- * we are looking at local streams).
- */
-function toggleLocalStream(selectAudioOrVideoTrack, typeToToggle) {
-  if (global.peerConnection == null)
-    error_('Tried to toggle local stream, but have no peer connection.');
-  if (global.peerConnection.getLocalStreams().length == 0)
-    error_('Tried to toggle local stream, but there is no local stream in ' +
-           'the call.');
-
-  var track = selectAudioOrVideoTrack(
-      global.peerConnection.getLocalStreams()[0]);
-  toggle_(track, 'local', typeToToggle);
-}
-
-/**
- * Hangs up a started call. Returns ok-call-hung-up on success. This tab will
- * not accept any incoming calls after this call.
- */
-function hangUp() {
-  if (global.peerConnection == null)
-    error_('hanging up, but has no peer connection');
-  if (getReadyState_() != 'active')
-    error_('hanging up, but ready state is not active (no call up).');
-  sendToPeer(global.remotePeerId, 'BYE');
-  closeCall_();
-  global.acceptsIncomingCalls = false;
-  print_('ok-call-hung-up');
-}
-
-/**
- * Start accepting incoming calls.
- */
-function acceptIncomingCalls() {
-  global.acceptsIncomingCalls = true;
-}
-
-/**
- * Creates a DataChannel on the current PeerConnection. Only one DataChannel can
- * be created on each PeerConnection.
- * Returns ok-datachannel-created on success.
- */
-function createDataChannelOnPeerConnection() {
-  if (global.peerConnection == null)
-    error_('Tried to create data channel, but have no peer connection.');
-
-  createDataChannel(global.peerConnection, global.ourClientName);
-  print_('ok-datachannel-created');
-}
-
-/**
- * Close the DataChannel on the current PeerConnection.
- * Returns ok-datachannel-close on success.
- */
-function closeDataChannelOnPeerConnection() {
-  if (global.peerConnection == null)
-    error_('Tried to close data channel, but have no peer connection.');
-
-  closeDataChannel(global.peerConnection);
-  print_('ok-datachannel-close');
-}
-
-/**
- * Creates a DTMF sender on the current PeerConnection.
- * Returns ok-dtmfsender-created on success.
- */
-function createDtmfSenderOnPeerConnection() {
-  if (global.peerConnection == null)
-    error_('Tried to create DTMF sender, but have no peer connection.');
-
-  createDtmfSender(global.peerConnection);
-  print_('ok-dtmfsender-created');
-}
-
-/**
- * Send DTMF tones on the global.dtmfSender.
- * Returns ok-dtmf-sent on success.
- */
-function insertDtmfOnSender(tones, duration, interToneGap) {
-  if (global.dtmfSender == null)
-    error_('Tried to insert DTMF tones, but have no DTMF sender.');
-
-  insertDtmf(tones, duration, interToneGap);
-  print_('ok-dtmf-sent');
-}
-
-/**
- * Sends a message to a peer through the peerconnection_server.
- */
-function sendToPeer(peer, message) {
-  var messageToLog = message.sdp ? message.sdp : message;
-  print_('Sending message ' + messageToLog + ' to peer ' + peer + '.');
-
-  var request = new XMLHttpRequest();
-  var url = global.serverUrl + '/message?peer_id=' + global.ourPeerId + '&to=' +
-      peer;
-  request.open('POST', url, false);
-  request.setRequestHeader('Content-Type', 'text/plain');
-  request.send(message);
-}
-
-/**
- * @param {!string} videoTagId The ID of the video tag to update.
- * @param {!number} width of the video to update the video tag, if width or
- *     height is 0, size will be taken from videoTag.videoWidth.
- * @param {!number} height of the video to update the video tag, if width or
- *     height is 0 size will be taken from the videoTag.videoHeight.
- */
-function updateVideoTagSize(videoTagId, width, height) {
-  var videoTag = $(videoTagId);
-  if (width > 0 || height > 0) {
-    videoTag.width = width;
-    videoTag.height = height;
-  }
-  else {
-    if (videoTag.videoWidth > 0 || videoTag.videoHeight > 0) {
-      videoTag.width = videoTag.videoWidth;
-      videoTag.height = videoTag.videoHeight;
-      print_('Set video tag "' + videoTagId + '" size to ' + videoTag.width +
-             'x' + videoTag.height);
-    }
-    else {
-      print_('"' + videoTagId + '" video stream size is 0, skipping resize');
-    }
-  }
-  displayVideoSize_(videoTag);
-}
-
-// Internals.
-
-/**
- * Disconnects from the peerconnection server. Returns ok-disconnected on
- * success.
- */
-function disconnect_() {
-  if (global.ourPeerId == null)
-    return;
-
-  request = new XMLHttpRequest();
-  request.open('GET', global.serverUrl + '/sign_out?peer_id=' +
-               global.ourPeerId, false);
-  request.send();
-  global.ourPeerId = null;
-  print_('ok-disconnected');
-}
-
-/**
-* Returns true if we are disconnected from peerconnection_server.
-*/
-function isDisconnected_() {
-  return global.ourPeerId == null;
-}
-
-/**
- * @private
- * @return {!string} The current peer connection's ready state, or
- *     'no-peer-connection' if there is no peer connection up.
- *
- * NOTE: The PeerConnection states are changing and until chromium has
- *       implemented the new states we have to use this interim solution of
- *       always assuming that the PeerConnection is 'active'.
- */
-function getReadyState_() {
-  if (global.peerConnection == null)
-    return 'no-peer-connection';
-
-  return 'active';
-}
-
-/**
- * This function asks permission to use the webcam and mic from the browser. It
- * will return ok-requested to the test. This does not mean the request was
- * approved though. The test will then have to click past the dialog that
- * appears in Chrome, which will run either the OK or failed callback as a
- * a result. To see which callback was called, use obtainGetUserMediaResult_().
- * @private
- * @param {string} constraints Defines what to be requested, with mandatory
- *     and optional constraints defined. The contents of this parameter depends
- *     on the WebRTC version. This should be JavaScript code that we eval().
- */
-function doGetUserMedia_(constraints) {
-  if (!getUserMedia) {
-    print_('Browser does not support WebRTC.');
-    return;
-  }
-  try {
-    var evaluatedConstraints;
-    eval('evaluatedConstraints = ' + constraints);
-  } catch (exception) {
-    error_('Not valid JavaScript expression: ' + constraints);
-  }
-  print_('Requesting doGetUserMedia: constraints: ' + constraints);
-  getUserMedia(evaluatedConstraints, getUserMediaOkCallback_,
-               getUserMediaFailedCallback_);
-}
-
-/**
- * Must be called after calling doGetUserMedia.
- * @private
- * @return {string} Returns not-called-yet if we have not yet been called back
- *     by WebRTC. Otherwise it returns either ok-got-stream or
- *     failed-with-error-x (where x is the error code from the error
- *     callback) depending on which callback got called by WebRTC.
- */
-function obtainGetUserMediaResult_() {
-  if (global.requestWebcamAndMicrophoneResult == null)
-    global.requestWebcamAndMicrophoneResult = ' not called yet';
-
-  return global.requestWebcamAndMicrophoneResult;
-
-}
-
-/**
- * Negotiates a call with the other side. This will create a peer connection on
- * the other side if there isn't one.
- *
- * To call this method we need to be aware of the other side, e.g. we must be
- * connected to peerconnection_server and we must have exactly one peer on that
- * server.
- *
- * This method may be called any number of times. If you haven't added any
- * streams to the call, an "empty" call will result. The method will return
- * ok-negotiating immediately to the test if the negotiation was successfully
- * sent.
- * @private
- */
-function negotiateCall_() {
-  if (global.peerConnection == null)
-    error_('Negotiating call, but we have no peer connection.');
-  if (global.ourPeerId == null)
-    error_('Negotiating call, but not connected.');
-  if (global.remotePeerId == null)
-    error_('Negotiating call, but missing remote peer.');
-
-  setupCall(global.peerConnection);
-  print_('ok-negotiating');
-}
-
-/**
- * This provides the selected source id from the objects in the parameters
- * provided to this function. If the audioSelect or video_select objects does
- * not have any HTMLOptions children it will return null in the source object.
- * @param {!object} audioSelect HTML drop down element with audio devices added
- *     as HTMLOptionsCollection children.
- * @param {!object} videoSelect HTML drop down element with audio devices added
- *     as HTMLOptionsCollection children.
- * @return {!object} source contains audio and video source ID from
- *     the selected devices in the drop down menu elements.
- * @private
- */
-function getSourcesFromField_(audioSelect, videoSelect) {
-  var source = {
-    audioId: null,
-    videoId: null
-  };
-  if (audioSelect.options.length > 0) {
-    source.audioId = audioSelect.options[audioSelect.selectedIndex].value;
-  }
-  if (videoSelect.options.length > 0) {
-    source.videoId = videoSelect.options[videoSelect.selectedIndex].value;
-  }
-  return source;
-}
-
-/**
- * @private
- * @param {NavigatorUserMediaError} error Error containing details.
- */
-function getUserMediaFailedCallback_(error) {
-  print_('GetUserMedia FAILED: Maybe the camera is in use by another process?');
-  gRequestWebcamAndMicrophoneResult = 'failed-with-error-' + error.name;
-  print_(gRequestWebcamAndMicrophoneResult);
-}
-
-/** @private */
-function success_(method) {
-  print_(method + '(): success.');
-}
-
-/** @private */
-function failure_(method, error) {
-  error_(method + '() failed: ' + error);
-}
-
-/** @private */
-function iceCallback_(event) {
-  if (event.candidate)
-    sendToPeer(global.remotePeerId, JSON.stringify(event.candidate));
-}
-
-/** @private */
-function setLocalAndSendMessage_(session_description) {
-  session_description.sdp =
-    global.transformOutgoingSdp(session_description.sdp);
-  global.peerConnection.setLocalDescription(
-    session_description,
-    function() { success_('setLocalDescription'); },
-    function() { failure_('setLocalDescription'); });
-  print_('Sending SDP message:\n' + session_description.sdp);
-  sendToPeer(global.remotePeerId, JSON.stringify(session_description));
-}
-
-/** @private */
-function addStreamCallback_(event) {
-  print_('Receiving remote stream...');
-  var videoTag = document.getElementById('remote-view');
-  attachMediaStream(videoTag, event.stream);
-
-  window.addEventListener('loadedmetadata', function() {
-     displayVideoSize_(videoTag);}, true);
-}
-
-/** @private */
-function removeStreamCallback_(event) {
-  print_('Call ended.');
-  document.getElementById('remote-view').src = '';
-}
-
-/** @private */
-function onCreateDataChannelCallback_(event) {
-  if (global.dataChannel != null && global.dataChannel.readyState != 'closed') {
-    error_('Received DataChannel, but we already have one.');
-  }
-
-  global.dataChannel = event.channel;
-  print_('DataChannel with label ' + global.dataChannel.label +
-            ' initiated by remote peer.');
-  hookupDataChannelEvents();
-}
-
-/** @private */
-function hookupDataChannelEvents() {
-  global.dataChannel.onmessage = global.dataCallback;
-  global.dataChannel.onopen = onDataChannelReadyStateChange_;
-  global.dataChannel.onclose = onDataChannelReadyStateChange_;
-  // Trigger global.dataStatusCallback so an application is notified
-  // about the created data channel.
-  onDataChannelReadyStateChange_();
-}
-
-/** @private */
-function onDataChannelReadyStateChange_() {
-  var readyState = global.dataChannel.readyState;
-  print_('DataChannel state:' + readyState);
-  global.dataStatusCallback(readyState);
-}
-
-/**
- * @private
- * @param {MediaStream} stream Media stream.
- */
-function getUserMediaOkCallback_(stream) {
-  global.localStream = stream;
-  global.requestWebcamAndMicrophoneResult = 'ok-got-stream';
-
-  if (stream.getVideoTracks().length > 0) {
-    // Show the video tag if we did request video in the getUserMedia call.
-    var videoTag = $('local-view');
-    attachMediaStream(videoTag, stream);
-
-   window.addEventListener('loadedmetadata', function() {
-       displayVideoSize_(videoTag);}, true);
-  }
-}
-
-/**
- * @private
- * @param {string} videoTag The ID of the video tag + stream used to
- *     write the size to a HTML tag based on id if the div's exists.
- */
-function displayVideoSize_(videoTag) {
-  if ($(videoTag.id + '-stream-size') && $(videoTag.id + '-size')) {
-    if (videoTag.videoWidth > 0 || videoTag.videoHeight > 0) {
-      $(videoTag.id + '-stream-size').innerHTML = '(stream size: ' +
-                                                  videoTag.videoWidth + 'x' +
-                                                  videoTag.videoHeight + ')';
-      $(videoTag.id + '-size').innerHTML = videoTag.width + 'x' +
-                                           videoTag.height;
-    }
-  } else {
-    print_('Skipping updating -stream-size and -size tags due to div\'s ' +
-           'are missing');
-  }
-}
-
-/**
- * Checks if the 'audiosrc' and 'videosrc' drop down menu elements has had all
- * of its children appended in order to provide device ID's to the function
- * 'updateGetUserMediaConstraints()', used in turn to populate the getUserMedia
- * constraints text box when the page has loaded.
- * @private
- */
-function checkIfDeviceDropdownsArePopulated_() {
-  if (document.addEventListener) {
-    $('audiosrc').addEventListener('DOMNodeInserted',
-         updateGetUserMediaConstraints, false);
-    $('videosrc').addEventListener('DOMNodeInserted',
-         updateGetUserMediaConstraints, false);
-  } else {
-    print_('addEventListener is not supported by your browser, cannot update ' +
-           'device source ID\'s automatically. Select a device from the audio' +
-           ' or video source drop down menu to update device source id\'s');
-  }
-}
-
-/**
- * Register an input element to use local storage to remember its state between
- * sessions (using local storage). Only input elements are supported.
- * @private
- * @param {!string} element_id to be used as a key for local storage and the id
- *     of the element to store the state for.
- */
-function registerLocalStorage_(element_id) {
-  var element = $(element_id);
-  if (element.tagName != 'INPUT') {
-    error_('You can only use registerLocalStorage_ for input elements. ' +
-          'Element \"' + element.tagName + '\" is not an input element. ');
-  }
-
-  if (localStorage.getItem(element.id) == 'undefined') {
-    storeLocalStorageField_(element);
-  } else {
-    getLocalStorageField_(element);
-  }
-  // Registers the appropriate events for input elements.
-  if (element.type == 'checkbox') {
-    element.onclick = function() { storeLocalStorageField_(this); };
-  } else if (element.type == 'text') {
-    element.onblur = function() { storeLocalStorageField_(this); };
-  } else {
-    error_('Unsupportered input type: ' + '\"' + element.type + '\"');
-  }
-}
-
-/**
- * Fetches the stored values from local storage and updates checkbox status.
- * @private
- * @param {!Object} element of which id is representing the key parameter for
- *     local storage.
- */
-function getLocalStorageField_(element) {
-  // Makes sure the checkbox status is matching the local storage value.
-  if (element.type == 'checkbox') {
-    element.checked = (localStorage.getItem(element.id) == 'true');
-  } else if (element.type == 'text') {
-    element.value = localStorage.getItem(element.id);
-  } else {
-    error_('Unsupportered input type: ' + '\"' + element.type + '\"');
-  }
-}
-
-/**
- * Stores the string value of the element object using local storage.
- * @private
- * @param {!Object} element of which id is representing the key parameter for
- *     local storage.
- */
-function storeLocalStorageField_(element) {
-  if (element.type == 'checkbox') {
-    localStorage.setItem(element.id, element.checked);
-  } else if (element.type == 'text') {
-    localStorage.setItem(element.id, element.value);
-  }
-}
-
-/**
- * Create the peer connection if none is up (this is just convenience to
- * avoid having a separate button for that).
- * @private
- */
-function ensureHasPeerConnection_() {
-  if (getReadyState_() == 'no-peer-connection') {
-    preparePeerConnection();
-  }
-}
-
-/**
- * @private
- * @param {string} message Text to print.
- */
-function print_(message) {
-  console.log(message);
-  $('messages').innerHTML += message + '<br>';
-}
-
-/**
- * @private
- * @param {string} message Text to print.
- */
-function debug_(message) {
-  console.log(message);
-  $('debug').innerHTML += message + '<br>';
-}
-
-/**
- * Print error message in the debug log + JS console and throw an Error.
- * @private
- * @param {string} message Text to print.
- */
-function error_(message) {
-  $('debug').innerHTML += '<span style="color:red;">' + message + '</span><br>';
-  throw new Error(message);
-}
-
-/**
- * @private
- * @param {string} stringRepresentation JavaScript as a string.
- * @return {Object} The PeerConnection constraints as a JavaScript dictionary.
- */
-function getEvaluatedJavaScript_(stringRepresentation) {
-  try {
-    var evaluatedJavaScript;
-    eval('evaluatedJavaScript = ' + stringRepresentation);
-    return evaluatedJavaScript;
-  } catch (exception) {
-    error_('Not valid JavaScript expression: ' + stringRepresentation);
-  }
-}
-
-/**
- * Swaps lines within a SDP message.
- * @private
- * @param {string} sdp The full SDP message.
- * @param {string} line The line to swap with swapWith.
- * @param {string} swapWith The other line.
- * @return {string} The altered SDP message.
- */
-function swapSdpLines_(sdp, line, swapWith) {
-  var lines = sdp.split('\r\n');
-  var lineStart = lines.indexOf(line);
-  var swapLineStart = lines.indexOf(swapWith);
-  if (lineStart == -1 || swapLineStart == -1)
-    return sdp;  // This generally happens on the first message.
-
-  var tmp = lines[lineStart];
-  lines[lineStart] = lines[swapLineStart];
-  lines[swapLineStart] = tmp;
-
-  return lines.join('\r\n');
-}
-
-/** @private */
-function forceIsac_() {
-  setOutgoingSdpTransform(function(sdp) {
-    // Remove all other codecs (not the video codecs though).
-    sdp = sdp.replace(/m=audio (\d+) RTP\/SAVPF.*\r\n/g,
-                      'm=audio $1 RTP/SAVPF 104\r\n');
-    sdp = sdp.replace('a=fmtp:111 minptime=10', 'a=fmtp:104 minptime=10');
-    sdp = sdp.replace(/a=rtpmap:(?!104)\d{1,3} (?!VP8|red|ulpfec).*\r\n/g, '');
-    return sdp;
-  });
-}
-
-/** @private */
-function dontTouchSdp_() {
-  setOutgoingSdpTransform(function(sdp) { return sdp; });
-}
-
-/** @private */
-function hookupDataChannelCallbacks_() {
-  setDataCallbacks(function(status) {
-    $('data-channel-status').value = status;
-  },
-  function(data_message) {
-    print_('Received ' + data_message.data);
-    $('data-channel-receive').value =
-      data_message.data + '\n' + $('data-channel-receive').value;
-  });
-}
-
-/** @private */
-function hookupDtmfSenderCallback_() {
-  setOnToneChange(function(tone) {
-    print_('Sent DTMF tone: ' + tone.tone);
-    $('dtmf-tones-sent').value =
-      tone.tone + '\n' + $('dtmf-tones-sent').value;
-  });
-}
-
-/** @private */
-function toggle_(track, localOrRemote, audioOrVideo) {
-  if (!track)
-    error_('Tried to toggle ' + localOrRemote + ' ' + audioOrVideo +
-                 ' stream, but has no such stream.');
-
-  track.enabled = !track.enabled;
-  print_('ok-' + audioOrVideo + '-toggled-to-' + track.enabled);
-}
-
-/** @private */
-function connectCallback_(request) {
-  print_('Connect callback: ' + request.status + ', ' + request.readyState);
-  if (request.status == 0) {
-    print_('peerconnection_server doesn\'t seem to be up.');
-    print_('failed-to-connect');
-  }
-  if (request.readyState == 4 && request.status == 200) {
-    global.ourPeerId = parseOurPeerId_(request.responseText);
-    global.remotePeerId = parseRemotePeerIdIfConnected_(request.responseText);
-    startHangingGet_(global.serverUrl, global.ourPeerId);
-    print_('ok-connected');
-  }
-}
-
-/** @private */
-function parseOurPeerId_(responseText) {
-  // According to peerconnection_server's protocol.
-  var peerList = responseText.split('\n');
-  return parseInt(peerList[0].split(',')[1]);
-}
-
-/** @private */
-function parseRemotePeerIdIfConnected_(responseText) {
-  var peerList = responseText.split('\n');
-  if (peerList.length == 1) {
-    // No peers have connected yet - we'll get their id later in a notification.
-    return null;
-  }
-  var remotePeerId = null;
-  for (var i = 0; i < peerList.length; i++) {
-    if (peerList[i].length == 0)
-      continue;
-
-    var parsed = peerList[i].split(',');
-    var name = parsed[0];
-    var id = parsed[1];
-
-    if (id != global.ourPeerId) {
-      print_('Found remote peer with name ' + name + ', id ' +
-                id + ' when connecting.');
-
-      // There should be at most one remote peer in this test.
-      if (remotePeerId != null)
-        error_('Expected just one remote peer in this test: ' +
-               'found several.');
-
-      // Found a remote peer.
-      remotePeerId = id;
-    }
-  }
-  return remotePeerId;
-}
-
-/** @private */
-function startHangingGet_(server, ourId) {
-  if (isDisconnected_())
-    return;
-
-  hangingGetRequest = new XMLHttpRequest();
-  hangingGetRequest.onreadystatechange = function() {
-    hangingGetCallback_(hangingGetRequest, server, ourId);
-  };
-  hangingGetRequest.ontimeout = function() {
-    hangingGetTimeoutCallback_(hangingGetRequest, server, ourId);
-  };
-  callUrl = server + '/wait?peer_id=' + ourId;
-  print_('Sending ' + callUrl);
-  hangingGetRequest.open('GET', callUrl, true);
-  hangingGetRequest.send();
-}
-
-/** @private */
-function hangingGetCallback_(hangingGetRequest, server, ourId) {
-  if (hangingGetRequest.readyState != 4 || hangingGetRequest.status == 0) {
-    // Code 0 is not possible if the server actually responded. Ignore.
-    return;
-  }
-  if (hangingGetRequest.status != 200) {
-    error_('Error ' + hangingGetRequest.status + ' from server: ' +
-           hangingGetRequest.statusText);
-  }
-  var targetId = readResponseHeader_(hangingGetRequest, 'Pragma');
-  if (targetId == ourId)
-    handleServerNotification_(hangingGetRequest.responseText);
-  else
-    handlePeerMessage_(targetId, hangingGetRequest.responseText);
-
-  hangingGetRequest.abort();
-  restartHangingGet_(server, ourId);
-}
-
-/** @private */
-function hangingGetTimeoutCallback_(hangingGetRequest, server, ourId) {
-  print_('Hanging GET times out, re-issuing...');
-  hangingGetRequest.abort();
-  restartHangingGet_(server, ourId);
-}
-
-/** @private */
-function handleServerNotification_(message) {
-  var parsed = message.split(',');
-  if (parseInt(parsed[2]) == 1) {
-    // Peer connected - this must be our remote peer, and it must mean we
-    // connected before them (except if we happened to connect to the server
-    // at precisely the same moment).
-    print_('Found remote peer with name ' + parsed[0] + ', id ' + parsed[1] +
-           ' when connecting.');
-    global.remotePeerId = parseInt(parsed[1]);
-  }
-}
-
-/** @private */
-function closeCall_() {
-  if (global.peerConnection == null)
-    debug_('Closing call, but no call active.');
-  global.peerConnection.close();
-  global.peerConnection = null;
-}
-
-/** @private */
-function handlePeerMessage_(peerId, message) {
-  print_('Received message from peer ' + peerId + ': ' + message);
-  if (peerId != global.remotePeerId) {
-    error_('Received notification from unknown peer ' + peerId +
-           ' (only know about ' + global.remotePeerId + '.');
-  }
-  if (message.search('BYE') == 0) {
-    print_('Received BYE from peer: closing call');
-    closeCall_();
-    return;
-  }
-  if (global.peerConnection == null && global.acceptsIncomingCalls) {
-    // The other side is calling us.
-    print_('We are being called: answer...');
-
-    global.peerConnection = createPeerConnection(STUN_SERVER,
-        $('data-channel-type-rtp').checked);
-
-    if ($('auto-add-stream-oncall') &&
-        obtainGetUserMediaResult_() == 'ok-got-stream') {
-      print_('We have a local stream, so hook it up automatically.');
-      addLocalStreamToPeerConnection(global.peerConnection);
-    }
-    answerCall(global.peerConnection, message);
-    return;
-  }
-  handleMessage(global.peerConnection, message);
-}
-
-/** @private */
-function restartHangingGet_(server, ourId) {
-  window.setTimeout(function() {
-    startHangingGet_(server, ourId);
-  }, 0);
-}
-
-/** @private */
-function readResponseHeader_(request, key) {
-  var value = request.getResponseHeader(key);
-  if (value == null || value.length == 0) {
-    error_('Received empty value ' + value +
-           ' for response header key ' + key + '.');
-  }
-  return parseInt(value);
-}