Change Platform members to getters instead of methods.

tests/standalone/io/file_system_links_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('dart:io');
 
 
 createLink(String dst, String link, bool symbolic, void callback()) {
   var args = [ symbolic ? '-s' : '', dst, link ];
   var script = 'tests/standalone/io/ln.sh';
   if (!new File(script).existsSync()) {
     script = '../$script';
   }
   new Process.run(script, args, null, (exit, out, err) {
     if (exit == 0) {
       callback();
     } else {
       throw new Exception('link creation failed');
     }
   });
 }
 
 
 testFileExistsCreate() {
   var temp = new Directory('');
   temp.createTempSync();
-  var x = '${temp.path}${Platform.pathSeparator()}x';
-  var y = '${temp.path}${Platform.pathSeparator()}y';
+  var x = '${temp.path}${Platform.pathSeparator}x';
+  var y = '${temp.path}${Platform.pathSeparator}y';
   createLink(x, y, true, () {
     Expect.isFalse(new File(x).existsSync());
     Expect.isFalse(new File(y).existsSync());
     new File(y).createSync();
     Expect.isTrue(new File(x).existsSync());
     Expect.isTrue(new File(y).existsSync());
     temp.deleteRecursivelySync();
   });
 }
 
 
 testFileDelete() {
   var temp = new Directory('');
   temp.createTempSync();
-  var x = '${temp.path}${Platform.pathSeparator()}x';
-  var y = '${temp.path}${Platform.pathSeparator()}y';
+  var x = '${temp.path}${Platform.pathSeparator}x';
+  var y = '${temp.path}${Platform.pathSeparator}y';
   new File(x).createSync();
   createLink(x, y, true, () {
     Expect.isTrue(new File(x).existsSync());
     Expect.isTrue(new File(y).existsSync());
     new File(y).deleteSync();
     Expect.isTrue(new File(x).existsSync());
     Expect.isFalse(new File(y).existsSync());
     createLink(x, y, false, () {
       Expect.isTrue(new File(x).existsSync());
       Expect.isTrue(new File(y).existsSync());
       new File(y).deleteSync();
       Expect.isTrue(new File(x).existsSync());
       Expect.isFalse(new File(y).existsSync());
       temp.deleteRecursivelySync();
     });
   });
 }
 
 
 testFileWriteRead() {
   var temp = new Directory('');
   temp.createTempSync();
-  var x = '${temp.path}${Platform.pathSeparator()}x';
-  var y = '${temp.path}${Platform.pathSeparator()}y';
+  var x = '${temp.path}${Platform.pathSeparator}x';
+  var y = '${temp.path}${Platform.pathSeparator}y';
   new File(x).createSync();
   createLink(x, y, true, () {
     var data = "asdf".charCodes();
     var output = new File(y).openOutputStream(FileMode.WRITE);
     output.write(data);
     output.onNoPendingWrites = () {
       output.close();
       var read = new File(y).readAsBytesSync();
       Expect.listEquals(data, read);
       var read2 = new File(x).readAsBytesSync();
       Expect.listEquals(data, read2);
       temp.deleteRecursivelySync();
     };
   });
 }
 
 
 testDirectoryExistsCreate() {
   var temp = new Directory('');
   temp.createTempSync();
-  var x = '${temp.path}${Platform.pathSeparator()}x';
-  var y = '${temp.path}${Platform.pathSeparator()}y';
+  var x = '${temp.path}${Platform.pathSeparator}x';
+  var y = '${temp.path}${Platform.pathSeparator}y';
   createLink(x, y, true, () {
     Expect.isFalse(new Directory(x).existsSync());
     Expect.isFalse(new Directory(y).existsSync());
     Expect.throws(new Directory(y).createSync);
     temp.deleteRecursivelySync();
   });
 }
 
 
 testDirectoryDelete() {
   var temp = new Directory('');
   temp.createTempSync();
   var temp2 = new Directory('');
   temp2.createTempSync();
-  var y = '${temp.path}${Platform.pathSeparator()}y';
-  var x = '${temp2.path}${Platform.pathSeparator()}x';
+  var y = '${temp.path}${Platform.pathSeparator}y';
+  var x = '${temp2.path}${Platform.pathSeparator}x';
   new File(x).createSync();
   createLink(temp2.path, y, true, () {
     var link = new Directory(y);
     Expect.isTrue(link.existsSync());
     Expect.isTrue(temp2.existsSync());
     link.deleteSync();
     Expect.isFalse(link.existsSync());
     Expect.isTrue(temp2.existsSync());
     createLink(temp2.path, y, true, () {
       Expect.isTrue(link.existsSync());
       temp.deleteRecursivelySync();
       Expect.isFalse(link.existsSync());
       Expect.isTrue(temp2.existsSync());
       Expect.isTrue(new File(x).existsSync());
       temp2.deleteRecursivelySync();
     });
   });
 }
 
 
 testDirectoryListing() {
   var temp = new Directory('');
   temp.createTempSync();
   var temp2 = new Directory('');
   temp2.createTempSync();
-  var y = '${temp.path}${Platform.pathSeparator()}y';
-  var x = '${temp2.path}${Platform.pathSeparator()}x';
+  var y = '${temp.path}${Platform.pathSeparator}y';
+  var x = '${temp2.path}${Platform.pathSeparator}x';
   new File(x).createSync();
   createLink(temp2.path, y, true, () {
     var files = [];
     var dirs = [];
     temp.list(recursive: true);
     temp.onFile = (f) => files.add(f);
     temp.onDir = (d) => dirs.add(d);
     temp.onDone = (success) {
       Expect.isTrue(success);
       Expect.equals(1, files.length);
       Expect.isTrue(files[0].endsWith(x));
       Expect.equals(1, dirs.length);
       Expect.isTrue(dirs[0].endsWith(y));
       temp.deleteRecursivelySync();
       temp2.deleteRecursivelySync();
     };
   });
 }
 
 
 main() {
   testFileExistsCreate();
   testFileDelete();
   testFileWriteRead();
   testDirectoryExistsCreate();
   testDirectoryDelete();
   testDirectoryListing();
 }