Define React Native as a type of browser

modules/RTC/RTCBrowserType.js

@@ -20,6 +20,8 @@ var RTCBrowserType = {
 
     RTC_BROWSER_NWJS: "rtc_browser.nwjs",
 
+    RTC_BROWSER_REACT_NATIVE: "rtc_browser.react-native",
+
     getBrowserType: function () {
         return currentBrowser;
     },
@@ -45,6 +47,9 @@ var RTCBrowserType = {
     isNWJS: function () {
         return currentBrowser === RTCBrowserType.RTC_BROWSER_NWJS;
     },
+    isReactNative: function () {
+        return currentBrowser === RTCBrowserType.RTC_BROWSER_REACT_NATIVE;
+    },
     isTemasysPluginUsed: function () {
         return RTCBrowserType.isIExplorer() || RTCBrowserType.isSafari();
     },
@@ -163,9 +168,25 @@ function detectNWJS (){
     return null;
 }
 
+function detectReactNative() {
+    var match
+        = navigator.userAgent.match(/\b(react[ \t_-]*native)(?:\/(\S+))?/i);
+    var version;
+    if (match) {
+        currentBrowser = RTCBrowserType.RTC_BROWSER_REACT_NATIVE;
+        if (match.length > 2) {
+            version = match[2];
+        }
+        console.info(
+            "This appears to be " + /* name */ match[1] + ", ver: " + version);
+    }
+    return version;
+}
+
 function detectBrowser() {
     var version;
     var detectors = [
+        detectReactNative,
         detectNWJS,
         detectOpera,
         detectChrome,

modules/RTC/RTCUtils.js

@@ -122,7 +122,11 @@ function getConstraints(um, options) {
         setResolutionConstraints(constraints, options.resolution);
     }
     if (um.indexOf('audio') >= 0) {
-        if (!RTCBrowserType.isFirefox()) {
+        if (RTCBrowserType.isReactNative()) {
+            // The react-native-webrtc project that we're currently using
+            // expects the audio constraint to be a boolean.
+            constraints.audio = true;
+        } else if (!RTCBrowserType.isFirefox()) {
             // same behaviour as true
             constraints.audio = { mandatory: {}, optional: []};
             if (options.micDeviceId) {
@@ -640,7 +644,10 @@ var RTCUtils = {
                 };
                 RTCSessionDescription = mozRTCSessionDescription;
                 RTCIceCandidate = mozRTCIceCandidate;
-            } else if (RTCBrowserType.isChrome() || RTCBrowserType.isOpera() || RTCBrowserType.isNWJS()) {
+            } else if (RTCBrowserType.isChrome() ||
+                    RTCBrowserType.isOpera() ||
+                    RTCBrowserType.isNWJS() ||
+                    RTCBrowserType.isReactNative()) {
                 this.peerconnection = webkitRTCPeerConnection;
                 var getUserMedia = navigator.webkitGetUserMedia.bind(navigator);
                 if (navigator.mediaDevices) {