Added builtin native call to exit the running vm

samples/total/src/TotalRunner.dart

Index: samples/total/src/TotalRunner.dart
diff --git a/samples/total/src/TotalRunner.dart b/samples/total/src/TotalRunner.dart
index d34510c0db70d33ca2d798acd15e3b6eeb8be7f3..ef87b676ee6621aa45ab39d2fca86f1ec452b47e 100755
--- a/samples/total/src/TotalRunner.dart
+++ b/samples/total/src/TotalRunner.dart
@@ -9,42 +9,37 @@ typedef void ExitCallback(int status, String exitString);
 
 void main() {
   String SERVER_EXEC_PATH = './TotalServer.dart';
-  String RESTART = "GRACEFUL RESTART!!";
-  String EXIT = "GRACEFUL EXIT!!";
+  final int RESTART_STATUS = 42;
+  final int EXIT_STATUS = 0;
 
   void keepServerRunning(int status, ServerRunner runner) {
-    switch (runner.lastExitString) {
-      case RESTART:
-        runner.lastExitString = '';
+    switch (status) {
+      case RESTART_STATUS:
         runner.run(keepServerRunning);
         break;
-      case EXIT:
+      case EXIT_STATUS:
         break;
       default:
-        print("ERROR: exiting due to unknown condition. Exit status: $status."
-              + " Exit string: '${runner.lastExitString}'");
+        print("ERROR: exiting due to unknown condition. Exit status: $status.");
         break;
     }
   }
 
-  new ServerRunner(SERVER_EXEC_PATH, [RESTART, EXIT]).run(keepServerRunning);
+  new ServerRunner(SERVER_EXEC_PATH).run(keepServerRunning);
 }
 
 class ServerRunner {
-  List<String> _exitStrings;
   String _serverMain;
 
   // TODO: fix this to use a bigger buffer when streams work better
   int _BUFSIZE = 1;
 
-  String lastExitString;
-
   // TODO: Release or Debug? We should be able to find automatically
   static final DART_EXEC_PATH = '../../../runtime/out/Release_ia32/dart_bin';
   static final CR = 0x0d;
   static final LF = 0x0a;
 
-  ServerRunner(String this._serverMain, List<String> this._exitStrings);
+  ServerRunner(String this._serverMain);
 
   void run(ExitCallback exitCallback) {
     Process dart = new Process(DART_EXEC_PATH, [_serverMain]);
@@ -78,21 +73,8 @@ class ServerRunner {
           readSoFar.clear();
           if (line.length != 0) {
             print(line);
-            _updateLastExitString(line);
           }
         }
       });
   }
-
-  void _updateLastExitString(String line) {
-    _exitStrings.some((String e) {
-        if (line.contains(e, 0)) {
-          lastExitString = e;
-          return true;
-        } else {
-          return false;
-        }
-      });
-  }
-
 }