Add back appendBlob and send variants in WebSocket.

sdk/lib/html/dart2js/html_dart2js.dart

 /// The Dart HTML library.
 ///
 /// For examples, see
 /// [Dart HTML5 Samples](https://github.com/dart-lang/dart-html5-samples)
 /// on Github.
 library dart.dom.html;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:_collection-dev' hide Symbol, deprecated;
@@ skipping 11069 matching lines @@
     return FormData._create_2();
   }
   static FormData _create_1(form) => JS('FormData', 'new FormData(#)', form);
   static FormData _create_2() => JS('FormData', 'new FormData()');
 
   /// Checks if this type is supported on the current platform.
   static bool get supported => JS('bool', '!!(window.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
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable()
 @DomName('HTMLFormElement')
 class FormElement extends _HTMLElement native "HTMLFormElement" {
   // To suppress missing implicit constructor warnings.
@@ skipping 12059 matching lines @@
 
   @JSName('removeEventListener')
   @DomName('WebSocket.removeEventListener')
   @DocsEditable()
   void $dom_removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   @DomName('WebSocket.send')
   @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);
 
   @DomName('WebSocket.onerror')
   @DocsEditable()
   Stream<Event> get onError => errorEvent.forTarget(this);
 
   @DomName('WebSocket.onmessage')
   @DocsEditable()
@@ skipping 6197 matching lines @@
       _position = nextPosition;
       return true;
     }
     _current = null;
     _position = _array.length;
     return false;
   }
 
   T get current => _current;
 }