Add more options to the help message in verbose mode.

bin/main.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 
 #include "include/dart_api.h"
 #include "include/dart_debugger_api.h"
@@ skipping 514 matching lines @@
 "Supported options:\n"
 "--checked \n"
 "  Insert runtime type checks and enable assertions (checked mode).\n"
 "\n"
 "--help\n"
 "  Display this message (add --verbose for information about all VM options).\n"
 "\n"
 "--package-root=<path>\n"
 "  Where to find packages, that is, \"package:...\" imports.\n"
 "\n"
+"--debug[:<port number>]\n"
+"  enables debugging and listens on specified port for debugger connections\n"
+"  (default port number is 5858)\n"
+"\n"
+"--break_at=<location>\n"
+"  sets a breakpoint at specified location where <location> is one of :\n"
+"  url:<line_num> e.g. test.dart:10\n"
+"  [<class_name>.]<function_name> e.g. B.foo\n"
+"\n"
+"--use_script_snapshot=<file_name>\n"
+"  executes Dart script present in the specified snapshot file\n"
+"\n"
 "The following options are only used for VM development and may\n"
 "be changed in any future version:\n");
     const char* print_flags = "--print_flags";
     Dart_SetVMFlags(1, &print_flags);
   }
 }
 
 
 static Dart_Handle SetBreakpoint(const char* breakpoint_at,
                                  Dart_Handle library) {
@@ skipping 189 matching lines @@
   Dart_ExitScope();
   // Dump symbol information for the profiler.
   DumpPprofSymbolInfo();
   // Shutdown the isolate.
   Dart_ShutdownIsolate();
   // Terminate process exit-code handler.
   Process::TerminateExitCodeHandler();
 
   return 0;
 }