Remove uses of Options from pkg, samples, tests, and third_party directories.

samples/build_dart_simple/build.dart

Index: samples/build_dart_simple/build.dart
diff --git a/samples/build_dart_simple/build.dart b/samples/build_dart_simple/build.dart
index 7dc0bcbfa36f93f00ae4660ce67e3193257c9660..0345f74a54b475547be504b4735e08bd4666ea23 100644
--- a/samples/build_dart_simple/build.dart
+++ b/samples/build_dart_simple/build.dart
@@ -11,8 +11,8 @@ import "dart:io";
  * In order to be invoked automatically by the Editor, this script must be named
  * 'build.dart' and placed in the root of a project.
  */
-void main() {
-  for (String arg in new Options().arguments) {
+void main(List<String> arguments) {
+  for (String arg in arguments) {
     if (arg.startsWith("--changed=")) {
       String file = arg.substring("--changed=".length);