Change dart:io to use Future for one-shot operations.

samples/total/server/TotalRunner.dart

Index: samples/total/server/TotalRunner.dart
diff --git a/samples/total/server/TotalRunner.dart b/samples/total/server/TotalRunner.dart
index 20f668d34d7b1609f63bea0cb637a3c78ceb405f..5a03ae3b198d0dda10f4b2ac9419a2ac65fa8f1e 100755
--- a/samples/total/server/TotalRunner.dart
+++ b/samples/total/server/TotalRunner.dart
@@ -52,9 +52,9 @@ class ServerRunner {
     if (foundExec == null) {
       print("No executable found on DART_EXECS:\n" + DART_EXECS);
       exitCallback(1, this);
-      return;      
+      return;
     }
-    Process dart = new Process.start(foundExec, [_serverMain]);
+    InteractiveProcess dart = Process.start(foundExec, [_serverMain]);
 
     dart.onExit = (int status) {
       dart.close();