Pull args, intl, logging, shelf, and source_maps out of the SDK.

pkg/shelf/lib/src/shelf_unmodifiable_map.dart

Index: pkg/shelf/lib/src/shelf_unmodifiable_map.dart
diff --git a/pkg/shelf/lib/src/shelf_unmodifiable_map.dart b/pkg/shelf/lib/src/shelf_unmodifiable_map.dart
deleted file mode 100644
index 7cb5553e3036348ed42e7e1ca79bbf983f0d01c6..0000000000000000000000000000000000000000
--- a/pkg/shelf/lib/src/shelf_unmodifiable_map.dart
+++ /dev/null
@@ -1,52 +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.
-
-library shelf.shelf_unmodifiable_map;
-
-import 'dart:collection';
-
-import 'package:collection/wrappers.dart' as pc;
-
-/// A simple wrapper over [pc.UnmodifiableMapView] which avoids re-wrapping
-/// itself.
-class ShelfUnmodifiableMap<V> extends UnmodifiableMapView<String, V> {
-  /// If [source] is a [ShelfUnmodifiableMap] with matching [ignoreKeyCase],
-  /// then [source] is returned.
-  ///
-  /// If [source] is `null` it is treated like an empty map.
-  ///
-  /// If [ignoreKeyCase] is `true`, the keys will have case-insensitive access.
-  ///
-  /// [source] is copied to a new [Map] to ensure changes to the paramater value
-  /// after constructions are not reflected.
-  factory ShelfUnmodifiableMap(Map<String, V> source,
-      {bool ignoreKeyCase: false}) {
-    if (source is ShelfUnmodifiableMap<V>) {
-      return source;
-    }
-
-    if (source == null || source.isEmpty) {
-      return const _EmptyShelfUnmodifiableMap();
-    }
-
-    if (ignoreKeyCase) {
-      source = new pc.CanonicalizedMap<String, String, V>.from(source,
-          (key) => key.toLowerCase(), isValidKey: (key) => key != null);
-    } else {
-      source = new Map<String, V>.from(source);
-    }
-
-    return new ShelfUnmodifiableMap<V>._(source);
-  }
-
-  ShelfUnmodifiableMap._(Map<String, V> source) : super(source);
-}
-
-/// An const empty implementation of [ShelfUnmodifiableMap].
-// TODO(kevmoo): Consider using MapView from dart:collection which has a const
-// ctor. Would require updating min SDK to 1.5.
-class _EmptyShelfUnmodifiableMap<V> extends pc.DelegatingMap<String, V>
-    implements ShelfUnmodifiableMap<V>  {
-  const _EmptyShelfUnmodifiableMap() : super(const {});
-}