Dartdoc and apidoc updated to use Path.

tests/compiler/dart2js/mirrors_test.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.
 
 #import("../../../lib/dartdoc/mirrors/mirrors.dart");
 #import("../../../lib/dartdoc/mirrors/mirrors_util.dart");
 
 #import('dart:io');
 
 int count(Iterable iterable) {
@@ skipping 11 matching lines @@
     }
   }
   return false;
 }
 
 main() {
   var scriptPath = new Path.fromNative(new Options().script);
   var dirPath = scriptPath.directoryPath;
   var libPath = dirPath.join(new Path.fromNative('../../../'));
   var inputPath = dirPath.join(new Path.fromNative('mirrors_helper.dart'));
-  var compilation = new Compilation(inputPath.toNativePath(),
-                                    libPath.toNativePath());
+  var compilation = new Compilation(inputPath, libPath);
   Expect.isNotNull(compilation, "No compilation created");
 
   var mirrors = compilation.mirrors();
   Expect.isNotNull(mirrors, "No mirror system returned from compilation");
 
   var libraries = mirrors.libraries();
   Expect.isNotNull(libraries, "No libraries map returned");
   Expect.isFalse(libraries.isEmpty(), "Empty libraries map returned");
 
   var helperLibrary = findMirror(libraries, "mirrors_helper");
@@ skipping 570 matching lines @@
   Expect.stringEquals('negate', operator_negate.operatorName,
                       "Unexpected operatorName");
 
 
   var bazClassConstructors = bazClass.constructors();
   Expect.isNotNull(bazClassConstructors, "Constructors map is null");
   Expect.equals(3, bazClassConstructors.length,
                 "Unexpected number of constructors");
   // TODO(johnniwinther): Add tests of constructors.
 }