Add multibyte string support to debugger

tools/ddbg.dart

 // 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.
 
 // Simple interactive debugger shell that connects to the Dart VM's debugger
 // connection port.
 
 #import("dart:io");
 #import("dart:json");
+#import("dart:utf");
+
 
 Map<int, Completer> outstandingCommands;
 
 Socket vmSock;
 String vmData;
 OutputStream vmStream;
 int seqNum = 0;
 
 bool verbose = false;
 
@@ skipping 401 matching lines @@
 void main() {
   outstandingCommands = new Map<int, Completer>();
   vmSock = new Socket("127.0.0.1", 5858);
   vmStream = new SocketOutputStream(vmSock);
   var stdinStream = new StringInputStream(stdin);
   stdinStream.onLine = () {
     processCommand(stdinStream.readLine());
   };
   var vmInStream = new SocketInputStream(vmSock);
   vmInStream.onData = () {
-    var s = new String.fromCharCodes(vmInStream.read());
+    String s = decodeUtf8(vmInStream.read());
     processVmData(s);
   };
   vmInStream.onError = (err) {
     print("Error in debug connection: $err");
     quitShell();
   };
   vmInStream.onClosed = () {
     print("VM debugger connection closed");
     quitShell();
   };
 }