Only start http server for browser tests.

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:math", prefix: "Math");
@@ skipping 44 matching lines @@
 }
 
 
 void quitShell() {
   vmStream.close();
   vmSock.close();
   stdin.close();
 }
 
 
-Future sendCmd(Map<String, Dynamic> cmd) {
+Future sendCmd(Map<String, dynamic> cmd) {
   var completer = new Completer();
   int id = cmd["id"];
   outstandingCommands[id] = completer;
   if (verbose) {
     print("sending: '${JSON.stringify(cmd)}'");
   }
   vmStream.writeString(JSON.stringify(cmd));
   return completer.future;
 }
 
@@ skipping 465 matching lines @@
   };
   vmInStream.onError = (err) {
     print("Error in debug connection: $err");
     quitShell();
   };
   vmInStream.onClosed = () {
     print("VM debugger connection closed");
     quitShell();
   };
 }