Move getters from Options to Platform

tests/standalone/io/file_test.dart

Index: tests/standalone/io/file_test.dart
diff --git a/tests/standalone/io/file_test.dart b/tests/standalone/io/file_test.dart
index c34b82392180265ec4e2dc83b2d5d2c7e8d374c2..b1590313565f88a4dcdc91878a6d3c9f5bfc9ed3 100644
--- a/tests/standalone/io/file_test.dart
+++ b/tests/standalone/io/file_test.dart
@@ -1106,7 +1106,7 @@ class FileTest {
 
   static void testLastModified() {
     var port = new ReceivePort();
-    new File(new Options().executable).lastModified().then((modified) {
+    new File(Platform.executable).lastModified().then((modified) {
       Expect.isTrue(modified is DateTime);
       Expect.isTrue(modified.isBefore(new DateTime.now()));
       port.close();
@@ -1114,7 +1114,7 @@ class FileTest {
   }
 
   static void testLastModifiedSync() {
-    var modified = new File(new Options().executable).lastModifiedSync();
+    var modified = new File(Platform.executable).lastModifiedSync();
     Expect.isTrue(modified is DateTime);
     Expect.isTrue(modified.isBefore(new DateTime.now()));
   }