dart/sdk/lib/html/dartium/html_dartium.dart

Index: dart/sdk/lib/html/dartium/html_dartium.dart
===================================================================
--- dart/sdk/lib/html/dartium/html_dartium.dart	(revision 40021)
+++ dart/sdk/lib/html/dartium/html_dartium.dart	(working copy)
@@ -28752,10 +28752,10 @@
     if ((blob_OR_source_OR_stream is Blob || blob_OR_source_OR_stream == null)) {
       return _blink.BlinkURL.$_createObjectURL_1_Callback(blob_OR_source_OR_stream);
     }
-    if ((blob_OR_source_OR_stream is MediaStream || blob_OR_source_OR_stream == null)) {
+    if ((blob_OR_source_OR_stream is MediaSource || blob_OR_source_OR_stream == null)) {
       return _blink.BlinkURL.$_createObjectURL_2_Callback(blob_OR_source_OR_stream);
     }
-    if ((blob_OR_source_OR_stream is MediaSource || blob_OR_source_OR_stream == null)) {
+    if ((blob_OR_source_OR_stream is MediaStream || blob_OR_source_OR_stream == null)) {
       return _blink.BlinkURL.$_createObjectURL_3_Callback(blob_OR_source_OR_stream);
     }
     throw new ArgumentError("Incorrect number or type of arguments");
@@ -39021,3 +39021,7 @@
 void _initializeCustomElement(Element e) {
   _Utils.initializeCustomElement(e);
 }
+
+// Class for unsupported native browser 'DOM' objects.
+class _UnsupportedBrowserObject extends NativeFieldWrapperClass2 {
+}