Update charted to 0.4.8 and roll

packages/path/lib/src/parsed_path.dart

 // Copyright (c) 2013, 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 path.parsed_path;
-
 import 'internal_style.dart';
 import 'style.dart';
 
 class ParsedPath {
   /// The [InternalStyle] that was used to parse this path.
   InternalStyle style;
 
   /// The absolute root portion of the path, or `null` if the path is relative.
   /// On POSIX systems, this will be `null` or "/". On Windows, it can be
   /// `null`, "//" for a UNC path, or something like "C:\" for paths with drive
@@ skipping 75 matching lines @@
       !parts.isEmpty && (parts.last == '' || separators.last != '');
 
   void removeTrailingSeparators() {
     while (!parts.isEmpty && parts.last == '') {
       parts.removeLast();
       separators.removeLast();
     }
     if (separators.length > 0) separators[separators.length - 1] = '';
   }
 
-  void normalize() {
+  void normalize({bool canonicalize: false}) {
     // Handle '.', '..', and empty parts.
     var leadingDoubles = 0;
     var newParts = <String>[];
     for (var part in parts) {
       if (part == '.' || part == '') {
         // Do nothing. Ignore it.
       } else if (part == '..') {
         // Pop the last part off.
         if (newParts.length > 0) {
           newParts.removeLast();
         } else {
           // Backed out past the beginning, so preserve the "..".
           leadingDoubles++;
         }
       } else {
-        newParts.add(part);
+        newParts.add(canonicalize ? style.canonicalizePart(part) : part);
       }
     }
 
     // A relative path can back out from the start directory.
     if (!isAbsolute) {
       newParts.insertAll(0, new List.filled(leadingDoubles, '..'));
     }
 
     // If we collapsed down to nothing, do ".".
     if (newParts.length == 0 && !isAbsolute) {
       newParts.add('.');
     }
 
     // Canonicalize separators.
     var newSeparators = new List<String>.generate(
         newParts.length, (_) => style.separator, growable: true);
     newSeparators.insert(0, isAbsolute &&
         newParts.length > 0 &&
         style.needsSeparator(root) ? style.separator : '');
 
     parts = newParts;
     separators = newSeparators;
 
     // Normalize the Windows root if needed.
     if (root != null && style == Style.windows) {
+      if (canonicalize) root = root.toLowerCase();
       root = root.replaceAll('/', '\\');
     }
     removeTrailingSeparators();
   }
 
   String toString() {
     var builder = new StringBuffer();
     if (root != null) builder.write(root);
     for (var i = 0; i < parts.length; i++) {
       builder.write(separators[i]);
@@ skipping 20 matching lines @@
     // If there is no dot, or it's the first character, like '.bashrc', it
     // doesn't count.
     if (lastDot <= 0) return [file, ''];
 
     return [file.substring(0, lastDot), file.substring(lastDot)];
   }
 
   ParsedPath clone() => new ParsedPath._(style, root, isRootRelative,
       new List.from(parts), new List.from(separators));
 }