Default constructor for dart:io Path now handles native Windows paths. Path() now does the same as…

utils/apidoc/apidoc.dart

Index: utils/apidoc/apidoc.dart
diff --git a/utils/apidoc/apidoc.dart b/utils/apidoc/apidoc.dart
index c2c119c9558f930fc6922e3389735e13c3169a53..3f19eaa1953c1d95cbbebb972f5a85f99dba107d 100644
--- a/utils/apidoc/apidoc.dart
+++ b/utils/apidoc/apidoc.dart
@@ -61,7 +61,7 @@ void main() {
         } else if (arg.startsWith('--include-lib=')) {
           includedLibraries.add(arg.substring('--include-lib='.length));
         } else if (arg.startsWith('--out=')) {
-          outputDir = new Path.fromNative(arg.substring('--out='.length));
+          outputDir = new Path(arg.substring('--out='.length));
         } else if (arg.startsWith('--pkg=')) {
           pkgPath = arg.substring('--pkg='.length);
         } else {
@@ -117,7 +117,7 @@ void main() {
 
   var lister = new Directory.fromPath(doc.scriptDir.append('../../pkg')).list();
   lister.onDir = (dirPath) {
-    var path = new Path.fromNative(dirPath);
+    var path = new Path(dirPath);
     var libName = path.filename;
 
     // TODO(rnystrom): Get rid of oldStylePath support when all packages are