Revert "Support relative paths in path dependencies."

utils/pub/hosted_source.dart

 // Copyright (c) 2012, 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 hosted_source;
 
 import 'dart:async';
 import 'dart:io' as io;
 import 'dart:json' as json;
 import 'dart:uri';
@@ skipping 38 matching lines @@
   }
 
   /// Downloads and parses the pubspec for a specific version of a package that
   /// is available from the site.
   Future<Pubspec> describe(PackageId id) {
     var parsed = _parseDescription(id.description);
     var fullUrl = "${parsed.last}/packages/${parsed.first}/versions/"
       "${id.version}.yaml";
 
     return httpClient.read(fullUrl).then((yaml) {
-      return new Pubspec.parse(null, yaml, systemCache.sources);
+      return new Pubspec.parse(yaml, systemCache.sources);
     }).catchError((ex) {
       _throwFriendlyError(ex, id, parsed.last);
     });
   }
 
   /// Downloads a package from the site and unpacks it.
   Future<bool> install(PackageId id, String destPath) {
     return defer(() {
       var parsedDescription = _parseDescription(id.description);
       var name = parsedDescription.first;
@@ skipping 37 matching lines @@
   String packageName(description) => _parseDescription(description).first;
 
   bool descriptionsEqual(description1, description2) =>
       _parseDescription(description1) == _parseDescription(description2);
 
   /// Ensures that [description] is a valid hosted package description.
   ///
   /// There are two valid formats. A plain string refers to a package with the
   /// given name from the default host, while a map with keys "name" and "url"
   /// refers to a package with the given name from the host at the given URL.
-  dynamic parseDescription(String containingPath, description,
-                           {bool fromLockFile: false}) {
+  void validateDescription(description, {bool fromLockFile: false}) {
     _parseDescription(description);
-    return description;
   }
 
   /// When an error occurs trying to read something about [package] from [url],
   /// this tries to translate into a more user friendly error message. Always
   /// throws an error, either the original one or a better one.
   void _throwFriendlyError(AsyncError asyncError, package, url) {
     if (asyncError.error is PubHttpException &&
         asyncError.error.response.statusCode == 404) {
       throw 'Could not find package "$package" at $url.';
     }
@@ skipping 32 matching lines @@
 
     var name = description["name"];
     if (name is! String) {
       throw new FormatException("The 'name' key must have a string value.");
     }
 
     var url = description.containsKey("url") ? description["url"] : defaultUrl;
     return new Pair<String, String>(name, url);
   }
 }