Replace dart_core.js with actual compiled SDK

lib/src/utils.dart

 // Copyright (c) 2015, 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.
 
 /// Holds a couple utility functions used at various places in the system.
 library dev_compiler.src.utils;
 
 import 'dart:io';
 
 import 'package:path/path.dart' as path;
@@ skipping 298 matching lines @@
 
   if (resourceUri.scheme != 'file') return null;
   var filepath = resourceUri.path;
   var relativePath = path.relative(filepath, from: path.dirname(entryUri.path));
 
   // File:/// urls can be for resources in the same project or resources from
   // the dev_compiler package. For now we only support relative paths going
   // further inside the folder where the entrypoint is located, otherwise we
   // assume this is a runtime resource from the dev_compiler.
   if (!relativePath.startsWith('..')) return relativePath;
+
   var segments = resourceUri.pathSegments;
-  var len = segments.length;
-  if (segments.length < 4 ||
-      segments[len - 2] != 'runtime' ||
-      segments[len - 3] != 'lib' ||
-      // If loaded from sources this will be exactly dev_compiler, otherwise it
-      // can be the name in the pub cache (typically dev_compiler-version).
-      !segments[len - 4].startsWith('dev_compiler')) {
-    return null;
+  for (int i = 0, len = segments.length; i < len; i++) {
+    var s = segments[i];
+    if (_packageNameWithVersion.stringMatch(s) == s &&

[Siggi Cherem (dart-lang), 2015/03/19 23:11:14]

FYI you'll have a not so fun merge conflict here :/

+        i + 3 < len &&
+        segments[i + 1] == 'lib' &&
+        segments[i + 2] == 'runtime') {
+      return path.joinAll(['dev_compiler']..addAll(segments.skip(i + 2)));
+    }
   }
-  return path.joinAll(['dev_compiler']..addAll(segments.skip(len - 2)));
+  return null;
 }
+
+// If loaded from sources this will be exactly dev_compiler, otherwise it
+// can be the name in the pub cache (typically dev_compiler-version).
+// TODO(jmesserly): avoid depending on pub cache implementation details.
+final _packageNameWithVersion = new RegExp('dev_compiler[0-9A-Za-z-.]*');