Add a new MIME-type package 'mime', with implementation for handling mime-type lookup by path (fine…

pkg/mime/lib/mime.dart

Index: pkg/mime/lib/mime.dart
diff --git a/tests/standalone/http_launch_data/packages/simple/simple.dart b/pkg/mime/lib/mime.dart
similarity index 68%
copy from tests/standalone/http_launch_data/packages/simple/simple.dart
copy to pkg/mime/lib/mime.dart
index b571f9d53d583067fa97ba4d61d852a0656f0e76..0943de8750846aeca61ce64c73ba3ed4b385ddf0 100644
--- a/tests/standalone/http_launch_data/packages/simple/simple.dart
+++ b/pkg/mime/lib/mime.dart
@@ -2,6 +2,8 @@
 // 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 simple;
+library mime;
 
-String getSimpleString() => 'hello';
+part 'src/mime_type.dart';
+part 'src/extension_map.dart';
+part 'src/magic_number.dart';