Add closure object type to debugger wire protocol

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:convert";
 import "dart:io";
 import "dart:async";
 
 
 Map<int, Completer> outstandingCommands;
 
 Socket vmSock;
 String vmData;
 var stdinSubscription;
 var vmSubscription;
 int seqNum = 0;
 int isolate_id = -1;
 
 final verbose = false;
-final printMessages = false;
+final printMessages = true;
 
 // The location of the last paused event.
 Map pausedLocation = null;
 
 
 void printHelp() {
   print("""
   q   Quit debugger shell
   bt  Show backtrace
   r   Resume execution
@@ skipping 207 matching lines @@
   var kind = value["kind"];
   var text = value["text"];
   var id = value["objectId"];
   if (kind == "string") {
     return "(string, id $id) '$text'";
   } else if (kind == "list") {
     var len = value["length"];
     return "(list, id $id, len $len) $text";
   } else if (kind == "object") {
     return "(obj, id $id) $text";
+  } else if (kind == "function") {
+    var location = value['location'] != null
+        ? ", file '${value['location']['url']}'"
+          ", token pos ${value['location']['tokenOffset']}"
+        : "";
+    var name = value['name'];
+    var signature = value['signature'];
+    return "(closure ${name}${signature} $location)";
   } else {
     return "$text";
   }
 }
 
 
 printNamedObject(obj) {
   var name = obj["name"];
   var value = obj["value"];
   print("  $name = ${remoteObject(value)}");
@@ skipping 372 matching lines @@
       process.stdin.close();
       process.exitCode.then((int exitCode) {
         print('${arguments.join(" ")} exited with $exitCode');
       });
       debuggerMain();
     });
   } else {
     debuggerMain();
   }
 }