Reorganize some pub libraries.

sdk/lib/_internal/pub/lib/src/source/path.dart

Index: sdk/lib/_internal/pub/lib/src/source/path.dart
diff --git a/sdk/lib/_internal/pub/lib/src/path_source.dart b/sdk/lib/_internal/pub/lib/src/source/path.dart
similarity index 94%
rename from sdk/lib/_internal/pub/lib/src/path_source.dart
rename to sdk/lib/_internal/pub/lib/src/source/path.dart
index 597205051790cc882398ee0917833e519f289f42..a8a5306f5551a5006bf5319a9f1c5e5e47cc4496 100644
--- a/sdk/lib/_internal/pub/lib/src/path_source.dart
+++ b/sdk/lib/_internal/pub/lib/src/source/path.dart
@@ -2,21 +2,21 @@
 // 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 path_source;
+library pub.source.path;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:pathos/path.dart' as path;
 
-import 'log.dart' as log;
+import '../log.dart' as log;
 
-import 'io.dart';
-import 'package.dart';
-import 'pubspec.dart';
-import 'version.dart';
-import 'source.dart';
-import 'utils.dart';
+import '../io.dart';
+import '../package.dart';
+import '../pubspec.dart';
+import '../version.dart';
+import '../source.dart';
+import '../utils.dart';
 
 /// A package [Source] that installs packages from a given local file path.
 class PathSource extends Source {