Make unique id to all scripts work with snapshot

test/mjsunit/debug-setbreakpoint.js

 // Copyright 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 41 matching lines @@
 function testArguments(dcp, arguments, success, is_script) {
   var request = '{' + base_request + ',"arguments":' + arguments + '}'
   var json_response = dcp.processDebugJSONRequest(request);
   var response = safeEval(json_response);
   if (success) {
     assertTrue(response.success, json_response);
     if (is_script) {
       assertEquals('scriptName', response.body.type, json_response);
     } else {
       assertEquals('scriptId', response.body.type, json_response);
-      print(response.body.script_id);
     }
   } else {
     assertFalse(response.success, json_response);
   }
 }
 
 function listener(event, exec_state, event_data, data) {
   try {
   if (event == Debug.DebugEvent.Break) {
     // Get the debug command processor.
@@ skipping 72 matching lines @@
 assertTrue(g_line > 0, "invalid line for g");
 assertTrue(f_line < g_line);
 assertEquals(h_line, 0, "invalid line for h");
 
 // Set a break point and call to invoke the debug event listener.
 Debug.setBreakPoint(g, 0, 0);
 g();
 
 // Make sure that the debug event listener vas invoked.
 assertTrue(listenerComplete, "listener did not run to completion: " + exception);