Remove uses of Options from tools directory. Fix platform_test.

tests/standalone/io/platform_test.dart

Index: tests/standalone/io/platform_test.dart
diff --git a/tests/standalone/io/platform_test.dart b/tests/standalone/io/platform_test.dart
index ce7809fc0fe121fa5ad712ce6eae9eb458ee644e..04494aac90cbc3dd8d4ca174519f65490ae0a738 100644
--- a/tests/standalone/io/platform_test.dart
+++ b/tests/standalone/io/platform_test.dart
@@ -48,10 +48,10 @@ testIsolate() {
   port.first.then((results) {
     Expect.equals(Platform.executable, results["Platform.executable"]);
 
-    Uri uri = Uri.file(results["Platform.script"]);
+    Uri uri = new Uri.file(results["Platform.script"]);
     // SpawnFunction retains the script url of the parent which in this
     // case was a relative path.
-    Expect.equals("", uri.scheme);
+    Expect.equals("file", uri.scheme);
     Expect.isTrue(uri.path.endsWith('tests/standalone/io/platform_test.dart'));
     Expect.equals(Platform.packageRoot, results["Platform.packageRoot"]);
     Expect.listEquals(Platform.executableArguments,