Fix for resolveRelativeUri() when the containedUri is absolute.

pkg/analyzer/lib/src/generated/utilities_dart.dart

 // 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 analyzer.src.generated.utilities_dart;
 
 import 'package:analyzer/dart/ast/ast.dart' show AnnotatedNode, Comment;
 import 'package:analyzer/dart/ast/token.dart' show Token;
 import 'package:analyzer/src/dart/element/element.dart' show ElementImpl;
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 /**
  * Resolve the [containedUri] against [baseUri] using Dart rules.
  *
  * This function behaves similarly to [Uri.resolveUri], except that it properly
  * handles situations like the following:
  *
  *     resolveRelativeUri(dart:core, bool.dart) -> dart:core/bool.dart
  *     resolveRelativeUri(package:a/b.dart, ../c.dart) -> package:a/c.dart
  */
 Uri resolveRelativeUri(Uri baseUri, Uri containedUri) {
+  if (containedUri.isAbsolute) {
+    return containedUri;
+  }
   Uri origBaseUri = baseUri;
   try {
     bool isOpaque = baseUri.isAbsolute && !baseUri.path.startsWith('/');
     if (isOpaque) {
       String scheme = baseUri.scheme;
       String part = baseUri.path;
       if (scheme == DartUriResolver.DART_SCHEME && part.indexOf('/') < 0) {
         part = "$part/$part.dart";
       }
       baseUri = parseUriWithException("$scheme:/$part");
@@ skipping 74 matching lines @@
   final bool isOptional;
 
   /**
    * Initialize a newly created kind with the given state.
    *
    * @param isOptional `true` if this is an optional parameter
    */
   const ParameterKind(String name, int ordinal, this.isOptional)
       : super(name, ordinal);
 }