Reapply "Remove @deprecated features."

editor/util/plugins/com.google.dart.java2dart/resources/java_io.dart

 library java.io;
 
 import "dart:io";
 import 'java_core.dart' show JavaIOException;
 import 'package:path/path.dart' as pathos;
 
 class JavaSystemIO {
   static Map<String, String> _properties = new Map();
   static String getProperty(String name) {
     {
@@ skipping 75 matching lines @@
     return result;
   }
   JavaFile getParentFile() {
     var parent = getParent();
     if (parent == null) return null;
     return new JavaFile(parent);
   }
   String getAbsolutePath() => pathos.absolute(_path);
   String getCanonicalPath() {
     try {
-      return _newFile().fullPathSync();
+      return _newFile().resolveSymbolicLinksSync();
     } catch (e) {
       throw new JavaIOException('IOException', e);
     }
   }
   JavaFile getAbsoluteFile() => new JavaFile(getAbsolutePath());
   JavaFile getCanonicalFile() => new JavaFile(getCanonicalPath());
   bool exists() {
     if (_newFile().existsSync()) {
       return true;
     }
@@ skipping 16 matching lines @@
     var files = <JavaFile>[];
     var entities = _newDirectory().listSync();
     for (FileSystemEntity entity in entities) {
       files.add(new JavaFile(entity.path));
     }
     return files;
   }
   File _newFile() => new File(_path);
   Directory _newDirectory() => new Directory(_path);
 }