Get deploy tests working on Windows.

sdk/lib/_internal/pub/lib/src/command_deploy.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 command_deploy;
 
 import 'dart:async';
 import 'dart:math' as math;
 
 import 'package:analyzer_experimental/analyzer.dart';
@@ skipping 31 matching lines @@
     if (!dirExists(source)) {
       throw new ApplicationException("There is no '$source' directory.");
     }
 
     return entrypoint.packageFiles(beneath: source).then((files) {
       log.message("Finding entrypoints...");
       _findEntrypoints(files);
       _computeLogSize();
 
       cleanDir(target);
-      _logAction("Copying", "${path.relative(source)}/",
-          "${path.relative(target)}/");
+      _logAction("Copying", "${path.relative(source)}${path.separator}",
+          "${path.relative(target)}${path.separator}");
       copyFiles(files.where((file) => path.extension(file) != '.dart'),
           source, target);
 
       return Future.forEach(_entrypoints, (sourceFile) {
         var targetFile =
             path.join(target, path.relative(sourceFile, from: source));
         var relativeTargetFile = path.relative(targetFile);
         var relativeSourceFile = path.relative(sourceFile);
 
         ensureDir(path.dirname(targetFile));
@@ skipping 34 matching lines @@
   }
 
   /// Computes the maximum widths of words that will be used in log output for
   /// the deploy command so we know how much padding to add when printing them.
   /// This should only be run after [_findEntrypoints].
   void _computeLogSize() {
     _maxVerbLength = ["Copying", "Compiling"]
         .map((verb) => verb.length).reduce(math.max);
     var sourceLengths = new List.from(
             _entrypoints.map((file) => path.relative(file).length))
-        ..add("${path.relative(source)}/".length);
+        ..add("${path.relative(source)}${path.separator}".length);
     if (_shouldAddDartJs) sourceLengths.add("package:browser/dart.js".length);
     _maxSourceLength = sourceLengths.reduce(math.max);
   }
 
   /// Log a deployment action. This should only be run after [_computeLogSize].
   void _logAction(String verb, String source, String target) {
     verb = padRight(verb, _maxVerbLength);
     source = padRight(source, _maxSourceLength);
     log.message("$verb $source $_arrow $target");
   }
@@ skipping 13 matching lines @@
   }
 
   /// Whether we should copy the browser package's dart.js file into the
   /// deployed app.
   bool get _shouldAddDartJs {
     return !_entrypoints.isEmpty &&
         entrypoint.root.dependencies.any((dep) =>
             dep.name == 'browser' && dep.source == 'hosted');
   }
 }