Port metrics to RPC

runtime/observatory/lib/service_html.dart

Index: runtime/observatory/lib/service_html.dart
diff --git a/runtime/observatory/lib/service_html.dart b/runtime/observatory/lib/service_html.dart
index f39253c56dac56f2a75b46c71d8ab8efeedb52c4..fe5b1c3af41d1a133bf222b96a8b96563540d579 100644
--- a/runtime/observatory/lib/service_html.dart
+++ b/runtime/observatory/lib/service_html.dart
@@ -5,7 +5,6 @@
 library service_html;
 
 import 'dart:async';
-import 'dart:convert';
 import 'dart:html';
 import 'dart:typed_data';
 
@@ -28,17 +27,17 @@ class _HtmlWebSocket implements CommonWebSocket {
     _webSocket.onOpen.listen((Event) => onOpen());
     _webSocket.onMessage.listen((MessageEvent event) => onMessage(event.data));
   }
-  
+
   bool get isOpen => _webSocket.readyState == WebSocket.OPEN;
-  
+
   void send(dynamic data) {
     _webSocket.send(data);
   }
-  
+
   void close() {
     _webSocket.close();
   }
-  
+
   Future<ByteData> nonStringToByteData(dynamic data) {
     assert(data is Blob);
     FileReader fileReader = new FileReader();