- Make sure that the threads for dart::bin are in the correct namespace.

runtime/bin/dbg_connection.h

Index: runtime/bin/dbg_connection.h
===================================================================
--- runtime/bin/dbg_connection.h	(revision 39229)
+++ runtime/bin/dbg_connection.h	(working copy)
@@ -103,7 +103,7 @@
   // mutex/condition variable used by isolates when writing back to the
   // debugger. This is also used to ensure that the isolate waits for
   // a debugger to be attached when that is requested on the command line.
-  static dart::Monitor* handler_lock_;
+  static Monitor* handler_lock_;
 
   static bool IsListening() {
     return listener_fd_ != -1;