[Fuchsia] Allows non-regular files to be opened.

runtime/tests/vm/dart/hello_fuchsia_test.dart

 // Copyright (c) 2016, 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.
 
 import "dart:async";
 import "dart:convert";
 import "dart:io";
 
 testAddressParse() async {
   print(new InternetAddress("1.0.2.3").rawAddress);
@@ skipping 456 matching lines @@
   await tmp0.delete(recursive: true);
 
   assert(!await file2.exists());
   assert(!await file1.exists());
   assert(!await file0.exists());
   assert(!await tmp2.exists());
   assert(!await tmp1.exists());
   assert(!await tmp0.exists());
 }
 
+bool testFileOpenDirectoryFails() {
+  File dir = new File(Directory.systemTemp.path);
+  try {
+    dir.openSync();
+  } on FileSystemException catch (e) {
+    return true;
+  } catch (e) {
+    print("Unexpected Exception: $e");
+    return false;
+  }
+}
+
 main(List<String> args) async {
   if (args.length >= 1) {
     if (args[0] == "infinite-loop") {
       while (true);
     }
   }
 
   print("Hello, Fuchsia!");
 
   print("testAddressParse");
@@ skipping 45 matching lines @@
   print("testKill done");
 
   print("testCopy");
   await testCopy();
   print("testCopy done");
 
   print("testRecursiveDelete");
   await testRecursiveDelete();
   print("testRecursiveDelete done");
 
+  print("testFileOpenDirectoryFails");
+  bool result = testFileOpenDirectoryFails();
+  if (result) {
+    print("testFileOpenDirectoryFails done");
+  } else {
+    print("testFileOpenDirectoryFails FAILED");
+  }
+
   print("Goodbyte, Fuchsia!");
 }