Fix wire json breakage

runtime/bin/dbg_message.cc

 // 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.
 
 #include "bin/dbg_connection.h"
 #include "bin/dbg_message.h"
 #include "bin/dartutils.h"
 #include "bin/thread.h"
 #include "bin/utils.h"
 
@@ skipping 411 matching lines @@
     ASSERT_NOT_ERROR(res);
     Dart_Handle func_name;
     Dart_CodeLocation location;
     res = Dart_ActivationFrameGetLocation(frame, &func_name, &location);
     ASSERT_NOT_ERROR(res);
     ASSERT(Dart_IsString(func_name));
     msg->Printf("%s{\"functionName\":", (i > 0) ? "," : "");
     FormatEncodedString(msg, func_name);
     if (!Dart_IsNull(location.script_url)) {
       ASSERT(Dart_IsString(location.script_url));
-      msg->Printf("\"location\": { \"url\":");
+      msg->Printf(",\"location\": { \"url\":");
       FormatEncodedString(msg, location.script_url);
       msg->Printf(",\"libraryId\":%d,", location.library_id);
-      msg->Printf("\"tokenOffset\":%d},", location.token_pos);
+      msg->Printf("\"tokenOffset\":%d}", location.token_pos);
     }
     Dart_Handle locals = Dart_GetLocalVariables(frame);
     ASSERT_NOT_ERROR(locals);
-    msg->Printf("\"locals\":");
+    msg->Printf(",\"locals\":");
     FormatNamedValueList(msg, locals);
     msg->Printf("}");
   }
   msg->Printf("]");
 }
 
 
 typedef bool (*CommandHandler)(DbgMessage* msg);
 
 struct JSONDebuggerCommand {
@@ skipping 760 matching lines @@
     msg_queue->SendIsolateEvent(isolate_id, kind);
     if (kind == kInterrupted) {
       msg_queue->HandleMessages();
     } else {
       ASSERT(kind == kShutdown);
       RemoveIsolateMsgQueue(isolate_id);
     }
   }
   Dart_ExitScope();
 }