Actual URI support for package URI resolution.

pkg/analyzer/lib/source/sdk_ext.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.
 
 library source.sdk_ext;
 
 import 'dart:convert';
 import 'dart:core' hide Resource;
 
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 33 matching lines @@
   /// Return the path mapping for [libName] or null if there is none.
   String operator[](String libName) => _urlMappings[libName];
 
   /// Programmatically add a new SDK extension given a JSON description
   /// ([sdkExtJSON]) and a lib directory ([libDir]).
   void addSdkExt(String sdkExtJSON, Folder libDir) {
     _processSdkExt(sdkExtJSON, libDir);
   }
 
   @override
-  Source resolveAbsolute(Uri importUri) {
+  Source resolveAbsolute(Uri importUri, [Uri actualUri]) {
     String libraryName = _libraryName(importUri);
     String partPath = _partPath(importUri);
     // Lookup library name in mappings.
     String mapping = _urlMappings[libraryName];
     if (mapping == null) {
       // Not found.
       return null;
     }
     // This mapping points to the main entry file of the sdk extension.
     Uri libraryEntry = new Uri.file(mapping);
@@ skipping 102 matching lines @@
   /// Resolve a 'part' statement inside an sdk extension.
   Source _resolvePart(Uri libraryEntry, String partPath, Uri importUri) {
     // Library part.
     var directory = pathos.dirname(libraryEntry.path);
     var partUri = new Uri.file(pathos.join(directory, partPath));
     assert(partUri.isAbsolute);
     JavaFile javaFile = new JavaFile.fromUri(partUri);
     return new FileBasedSource(javaFile, importUri);
   }
 }