Avoid calling anything related to signals on Windows

runtime/bin/vmservice/vmservice_io.dart

Index: runtime/bin/vmservice/vmservice_io.dart
diff --git a/runtime/bin/vmservice/vmservice_io.dart b/runtime/bin/vmservice/vmservice_io.dart
index 3b3bc26a34d09e747aeb901128d1bed663897476..399b941dfd797dfb85fe335fe4a22fd7ed808fb5 100644
--- a/runtime/bin/vmservice/vmservice_io.dart
+++ b/runtime/bin/vmservice/vmservice_io.dart
@@ -20,6 +20,8 @@ String _ip;
 // Should the HTTP server auto start?
 bool _autoStart;
 
+bool _isWindows = false;
+
 // HTTP servr.
 Server server;
 Future<Server> serverFuture;
@@ -45,6 +47,10 @@ void _onSignal(ProcessSignal signal) {
 }
 
 void registerSignalHandler() {
+  if (_isWindows) {

[Anders Johnsen, 2014/06/18 07:24:10]

Use Platform.isWindows.

+    // Cannot register for signals on Windows.
+    return;
+  }
   bool useSIGQUIT = true;
   // Listen for SIGQUIT.
   if (useSIGQUIT) {
@@ -68,9 +74,5 @@ main() {
     server.startup();
   }
 
-  try {
-    registerSignalHandler();
-  } catch (_) {
-    // Listening for signals will fail on Windows.
-  }
+  registerSignalHandler();
 }