Redo "running" field in debug-delay.js and support "suspend" command

test/mjsunit/regress/regress-1081309.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 51 matching lines @@
 
 function listener(event, exec_state, event_data, data) {
   try {
   if (event == Debug.DebugEvent.Exception)
   {
     // The expected backtrace is
     // 1: g
     // 0: [anonymous]
     
     // Get the debug command processor.
-    var dcp = exec_state.debugCommandProcessor();
+    var dcp = exec_state.debugCommandProcessor(false);
 
     // Get the backtrace.
     var json;
     json = '{"seq":0,"type":"request","command":"backtrace"}'
     var response = new ParsedResponse(dcp.processDebugJSONRequest(json));
     var backtrace = response.body();
     assertEquals(2, backtrace.totalFrames);
     assertEquals(2, backtrace.frames.length);
 
     assertEquals("g", response.lookup(backtrace.frames[0].func.ref).name);
@@ skipping 15 matching lines @@
 };
 
 // Break on the exception to do a backtrace with undefined as receiver.
 Debug.setBreakOnException(true);
 try {
   g();
 } catch(e) {
   // Ignore the exception "Cannot call method 'x' of undefined"
 }
 
+assertFalse(exception, "exception in listener", exception)
 // Make sure that the debug event listener vas invoked.
 assertTrue(listenerCalled, "listener not called");
-assertFalse(exception, "exception in listener", exception)