Add support for listing to the glob package.

pkg/glob/lib/src/utils.dart

Index: pkg/glob/lib/src/utils.dart
diff --git a/pkg/glob/lib/src/utils.dart b/pkg/glob/lib/src/utils.dart
index 12952e88151139317a443ca6a25befc148d52330..fdbc49ac8b111501fe310e0d70b5e0624107efdf 100644
--- a/pkg/glob/lib/src/utils.dart
+++ b/pkg/glob/lib/src/utils.dart
@@ -4,6 +4,8 @@
 
 library glob.utils;
 
+import 'package:path/path.dart' as p;
+
 /// A range from [min] to [max], inclusive.
 class Range {
   /// The minimum value included by the range.
@@ -53,3 +55,11 @@ final _quote = new RegExp(r"[+*?{}|[\]\\().^$-]");
 /// expressions backslash-escaped.
 String regExpQuote(String contents) =>
     contents.replaceAllMapped(_quote, (char) => "\\${char[0]}");
+
+/// Returns [path] with all its separators replaced with forward slashes.
+///
+/// This is useful when converting from Windows paths to globs.
+String separatorToForwardSlash(String path) {
+  if (p.context != p.Style.windows) return path;
+  return path.replaceAll('\\', '/');
+}