Expose unprefixed RTCPeerConnection

tools/perf/page_sets/webrtc_track_peerconnections.js

 // Copyright 2014 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.
 
-// This file overwrites the webkitRTCPeerConnection constructor with a
-// new constructor which tracks all created connections. It does this by
-// periodically gathering statistics on all connections, using the WebRTC
-// statistics API. All reports are gathered into window.peerConnectionReports,
-// which contains one list per connection. In each list there is a number of
-// report batches, which in turn contains metric names mapped to values.
+// This file overwrites the RTCPeerConnection constructor with a new constructor
+// which tracks all created connections. It does this by periodically gathering
+// statistics on all connections, using the WebRTC statistics API. All reports
+// are gathered into window.peerConnectionReports, which contains one list per
+// connection. In each list there is a number of report batches, which in turn
+// contains metric names mapped to values.
 
 window.peerConnectionReports = [];
 
-webkitRTCPeerConnection = (function() {
+RTCPeerConnection = webkitRTCPeerConnection = (function() {
   function getReportsAsDicts(getStatsResult) {
     var result = [];
     getStatsResult.forEach(function(report) {
       var values = {};
       report.names().forEach(function(name) {
         values[name] = report.stat(name);
       });
       result.push(values);
     });
     return result;
   }
 
   function gatherStatsFromOneConnection(peerConnection) {
     var connectionId = window.peerConnectionReports.length;
     window.peerConnectionReports.push([]);
     var pollIntervalMs = 1000;
 
     setInterval(function() {
       peerConnection.getStats(function(response) {
         var reports = getReportsAsDicts(response.result());
         window.peerConnectionReports[connectionId].push(reports);
       });
     }, pollIntervalMs);
   }
 
-  var originalConstructor = webkitRTCPeerConnection;
+  var originalConstructor = RTCPeerConnection;
   return function() {
     // Bind the incoming arguments to the original constructor.
     var args = [null].concat(Array.prototype.slice.call(arguments));
     var factoryFunction = originalConstructor.bind.apply(
       originalConstructor, args);
 
     // Create the object and track it.
     var peerConnection = new factoryFunction();
     gatherStatsFromOneConnection(peerConnection);
     return peerConnection;
   }
-})();
+})();