Revert "dart2js: add --preserve-uris flag."

tests/compiler/dart2js/preserve_uris_test.dart

Index: tests/compiler/dart2js/preserve_uris_test.dart
diff --git a/tests/compiler/dart2js/preserve_uris_test.dart b/tests/compiler/dart2js/preserve_uris_test.dart
deleted file mode 100644
index e0b8f1f02ce014c67c70abf34614eb7f0488fafe..0000000000000000000000000000000000000000
--- a/tests/compiler/dart2js/preserve_uris_test.dart
+++ /dev/null
@@ -1,62 +0,0 @@
-// Copyright (c) 2014, 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 'package:expect/expect.dart';
-import 'package:async_helper/async_helper.dart';
-import 'memory_compiler.dart' show compilerFor, OutputCollector;
-
-const MEMORY_SOURCE_FILES = const <String, String> {
-  'main.dart': """
-library main;
-
-@MirrorsUsed(targets: const ['main', 'lib'])
-import 'dart:mirrors';
-import 'lib.dart';
-
-
-class Subclass extends Super {
-  int _private;
-
-  int magic() => _private++;
-}
-
-main() {
-  var objects = [new Super(), new Subclass()];
-  print(currentMirrorSystem().findLibrary(#main).uri);
-}
-""",
-  'lib.dart': """
-library lib;
-
-class Super {
-  int _private;
-
-  int magic() => _private++;
-}
-"""
-};
-
-runTest(bool preserveUris) {
-  OutputCollector collector = new OutputCollector();
-  var options = ["--minify"];
-  if (preserveUris) options.add("--preserve-uris");
-  var compiler = compilerFor(MEMORY_SOURCE_FILES,
-                             outputProvider: collector,
-                             options: options);
-  return compiler.runCompiler(Uri.parse('memory:main.dart')).then((_) {
-    String jsOutput = collector.getOutput('', 'js');
-    Expect.equals(preserveUris, jsOutput.contains("main.dart"));
-    Expect.equals(preserveUris, jsOutput.contains("lib.dart"));
-  });
-}
-
-void main() {
-  asyncStart();
-  new Future.value()
-    .then((_) => runTest(true))
-    .then((_) => runTest(false))
-    .whenComplete(asyncEnd);
-}