Add Resource class.

runtime/lib/core_patch.dart

 // 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.
 
 import "dart:math";
 import "dart:typed_data";
+import "dart:convert" show UTF8;

[Ivan Posva, 2015/06/12 10:51:03]

Not needed. Please remove.

 
 // Equivalent of calling FATAL from C++ code.
 _fatal(msg) native "DartCore_fatal";
 
 // We need to pass the exception and stack trace objects as second and third
 // parameter to the continuation.  See vm/ast_transformer.cc for usage.
 void  _asyncCatchHelper(catchFunction, continuation) {
   catchFunction((e, s) => continuation(null, e, s));
 }
 
@@ skipping 181 matching lines @@
       if (isYieldEach) {
         // Spec mandates: it is a dynamic error if the class of [the object
         // returned by yield*] does not implement Iterable.
         yieldEachIterator = (current as Iterable).iterator;
         continue;
       }
       return true;
     }
   }
 }
+
+patch class Resource {
+  /* patch */ const factory Resource(String uri) = _Resource;
+}
+
+class _Resource implements Resource {
+  final String _location;
+
+  /* patch */ const _Resource(String uri) : _location = uri;
+
+  Uri get uri => Uri.base.resolve(_location);
+
+  Stream<List<int>> openRead() {
+    throw new UnimplementedError("openRead");
+  }
+
+  Future<List<int>> readAsBytes() {
+    throw new UnimplementedError("readAsBytes");
+  }
+
+  Future<String> readAsString({Encoding encoding}) {
+    throw new UnimplementedError("readAsString");
+  }
+}