Delete socket connection after debugger input loop ends.

R=svenpanne@chromium.org
BUG=v8:3193
LOG=N

Review URL: https://codereview.chromium.org/198073004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19991 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/d8-debug.cc

@@ -217,6 +217,8 @@ void RemoteDebugger::Run() {
     delete event;
   }
 
+  delete conn_;
+  conn_ = NULL;
   // Wait for the receiver thread to end.
   receiver.Join();
 }