Move source maps package to the dart repo, so it can be used by other internal

pkg/source_maps/test/parser_test.dart

Index: pkg/source_maps/test/parser_test.dart
diff --git a/pkg/source_maps/test/parser_test.dart b/pkg/source_maps/test/parser_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..1c32cbd349a0c18b660b1647857f08fc624063a9
--- /dev/null
+++ b/pkg/source_maps/test/parser_test.dart
@@ -0,0 +1,36 @@
+// Copyright (c) 2013, 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.
+
+library test.parser_test;
+
+import 'dart:json' as json;
+import 'package:unittest/unittest.dart';
+import 'package:source_maps/source_maps.dart';
+import 'common.dart';
+
+main() {
+  test('parse', () {
+    var mapping = parseJson(EXPECTED_MAP);
+    check(outputVar1, mapping, inputVar1, false);
+    check(outputVar2, mapping, inputVar2, false);
+    check(outputFunction, mapping, inputFunction, false);
+    check(outputExpr, mapping, inputExpr, false);
+  });
+
+  test('parse + json', () {
+    var mapping = parse(json.stringify(EXPECTED_MAP));
+    check(outputVar1, mapping, inputVar1, false);
+    check(outputVar2, mapping, inputVar2, false);
+    check(outputFunction, mapping, inputFunction, false);
+    check(outputExpr, mapping, inputExpr, false);
+  });
+
+  test('parse with file', () {
+    var mapping = parseJson(EXPECTED_MAP);
+    check(outputVar1, mapping, inputVar1, true);
+    check(outputVar2, mapping, inputVar2, true);
+    check(outputFunction, mapping, inputFunction, true);
+    check(outputExpr, mapping, inputExpr, true);
+  });
+}