Remove profiler signal handler on shutdown

runtime/vm/signal_handler_win.cc

 // Copyright (c) 2013, 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 "vm/globals.h"
 #include "vm/signal_handler.h"
 #if defined(TARGET_OS_WINDOWS)
 
 namespace dart {
 
@@ skipping 25 matching lines @@
   UNIMPLEMENTED();
   return 0;
 }
 
 
 void SignalHandler::Install(SignalAction action) {
   UNIMPLEMENTED();
 }
 
 
+void SignalHandler::Remove(SignalAction action) {
+  UNIMPLEMENTED();
+}
+
+
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)