Remove line added by accident.

src/debug.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2694 matching lines @@
       fun,
       Handle<Object>(Debug::debug_context_->global_proxy()),
       kArgc,
       argv,
       pending_exception);
   return result;
 }
 
 
 static void StubMessageHandler2(const v8::Debug::Message& message) {
-  PrintF("XXX\n");
   // Simply ignore message.
 }
 
 
 bool Debugger::StartAgent(const char* name, int port,
                           bool wait_for_connection) {
   if (wait_for_connection) {
     // Suspend V8 if it is already running or set V8 to suspend whenever
     // it starts.
     // Provide stub message handler; V8 auto-continues each suspend
@@ skipping 335 matching lines @@
     {
       Locker locker;
       Debugger::CallMessageDispatchHandler();
     }
   }
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal