Bug 804118 - Fix crashtests to use mozRTCPeerConnection insread of mozPeerConnection. r=jesup

dom/media/tests/crashtests/791270.html

@@ -7,7 +7,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=791270
   <meta charset="utf-8">
   <title>Simple PeerConnection Video Test</title>
   <script type="application/javascript">
-    var pc = new mozPeerConnection();
+    var pc = new mozRTCPeerConnection();
     pc.addStream(undefined);
   </script>
 </head>

dom/media/tests/crashtests/791278.html

@@ -7,10 +7,10 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=791278
   <meta charset="utf-8">
   <title>Simple PeerConnection Video Test - Invalid callback</title>
   <script type="application/javascript">
-    var pc1 = new mozPeerConnection();
+    var pc1 = new mozRTCPeerConnection();
     pc1.setLocalDescription(function() {});
 
-    var pc2 = new mozPeerConnection();
+    var pc2 = new mozRTCPeerConnection();
     pc2.setRemoteDescription(function() {});
   </script>
 </head>