Add back appendBlob and send variants in WebSocket.

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index d2e78dd3d6f8bd20a68edc6c5ec2b0a02a8b224c..88604c5babab76bdc11cb3afd7f29c6ae65b07fe 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -11087,7 +11087,12 @@ class FormData extends Interceptor native "FormData" {
 
   @DomName('FormData.append')
   @DocsEditable()
-  void append(String name, value, [String filename]) native;
+  void append(String name, String value) native;
+
+  @JSName('append')
+  @DomName('FormData.append')
+  @DocsEditable()
+  void appendBlob(String name, Blob value, [String filename]) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
@@ -23167,6 +23172,26 @@ class WebSocket extends EventTarget native "WebSocket" {
   @DocsEditable()
   void send(data) native;
 
+  @JSName('send')
+  @DomName('WebSocket.send')
+  @DocsEditable()
+  void sendBlob(Blob data) native;
+
+  @JSName('send')
+  @DomName('WebSocket.send')
+  @DocsEditable()
+  void sendByteBuffer(ByteBuffer data) native;
+
+  @JSName('send')
+  @DomName('WebSocket.send')
+  @DocsEditable()
+  void sendString(String data) native;
+
+  @JSName('send')
+  @DomName('WebSocket.send')
+  @DocsEditable()
+  void sendTypeData(TypedData data) native;
+
   @DomName('WebSocket.onclose')
   @DocsEditable()
   Stream<CloseEvent> get onClose => closeEvent.forTarget(this);