Revert r43217, r43215, r43208, r43207, and r43202.

runtime/bin/vmservice.h

Index: runtime/bin/vmservice.h
diff --git a/runtime/bin/io_service_unsupported.cc b/runtime/bin/vmservice.h
similarity index 57%
copy from runtime/bin/io_service_unsupported.cc
copy to runtime/bin/vmservice.h
index 9e51ca19792fc940814207089371f2ae86e26d23..4dcf93f704aaf7e82fc4d54ab5dbd81d2c7ee64e 100644
--- a/runtime/bin/io_service_unsupported.cc
+++ b/runtime/bin/vmservice.h
@@ -2,20 +2,16 @@
 // 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 "bin/builtin.h"
-#include "bin/dartutils.h"
+#ifndef BIN_VMSERVICE_H_
+#define BIN_VMSERVICE_H_
 
 #include "include/dart_api.h"
 
-
 namespace dart {
 namespace bin {
 
-void FUNCTION_NAME(IOService_NewServicePort)(Dart_NativeArguments args) {
-  Dart_ThrowException(DartUtils::NewDartArgumentError(
-      "IOService is unsupported on this platform"));
-}
 
 }  // namespace bin
 }  // namespace dart
 
+#endif  // BIN_VMSERVICE_H_