Switch pkg packages, pub, and dartdoc to use package: imports.

utils/pub/validator/name.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 name_validator;
 
 import 'dart:async';
 import 'dart:io';
 
-import '../../../pkg/pathos/lib/path.dart' as path;
+import 'package:pathos/path.dart' as path;
 
 import '../entrypoint.dart';
 import '../io.dart';
 import '../utils.dart';
 import '../validator.dart';
 
 /// Dart reserved words, from the Dart spec.
 final _RESERVED_WORDS = [
   "assert", "break", "case", "catch", "class", "const", "continue", "default",
   "do", "else", "extends", "false", "final", "finally", "for", "if", "in", "is",
@@ skipping 72 matching lines @@
       builder
         ..write(source.substring(lastMatchEnd, match.start + 1))
         ..write("_")
         ..write(match.group(1).toLowerCase());
       lastMatchEnd = match.end;
     }
     builder.write(source.substring(lastMatchEnd));
     return builder.toString().toLowerCase();
   }
 }