Change all File APIs to make the mode and encoding arguments named

tests/standalone/io/file_error_test.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// 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.
 //
 // Dart test program for testing error handling in file I/O.
 
 import "dart:io";
 import "dart:isolate";
 
 Directory tempDir() {
   return new Directory('').createTempSync();
@@ skipping 31 matching lines @@
   p.receive((x, y) {
     p.close();
     temp.deleteSync(recursive: true);
   });
   var file = new File("${temp.path}/nonExistentFile");
 
   // Non-existing file should throw exception.
   Expect.throws(() => file.openSync(),
                 (e) => checkOpenNonExistentFileException(e));
 
-  var openFuture = file.open(FileMode.READ);
+  var openFuture = file.open(mode: FileMode.READ);
   openFuture.then((raf) => Expect.fail("Unreachable code"))
             .catchError((e) {
               checkOpenNonExistentFileException(e.error);
               p.toSendPort().send(null);
             });
 }
 
 
 void testDeleteNonExistent() {
   Directory temp = tempDir();
@@ skipping 165 matching lines @@
   p.receive((x, y) {
     p.close();
     temp.deleteSync(recursive: true);
   });
   var file = new File("${temp.path}/nonExistentFile4");
 
   // Non-existing file should throw exception.
   Expect.throws(() => file.readAsStringSync(),
                 (e) => checkOpenNonExistentFileException(e));
 
-  var readAsStringFuture = file.readAsString(Encoding.ASCII);
+  var readAsStringFuture = file.readAsString(encoding: Encoding.ASCII);
   readAsStringFuture.then((data) => Expect.fail("Unreachable code"))
   .catchError((e) {
     checkOpenNonExistentFileException(e.error);
     p.toSendPort().send(null);
   });
 }
 
 testReadAsLinesNonExistent() {
   Directory temp = tempDir();
   ReceivePort p = new ReceivePort();
   p.receive((x, y) {
     p.close();
     temp.deleteSync(recursive: true);
   });
   var file = new File("${temp.path}/nonExistentFile5");
 
   // Non-existing file should throw exception.
   Expect.throws(() => file.readAsLinesSync(),
                 (e) => checkOpenNonExistentFileException(e));
 
-  var readAsLinesFuture = file.readAsLines(Encoding.ASCII);
+  var readAsLinesFuture = file.readAsLines(encoding: Encoding.ASCII);
   readAsLinesFuture.then((data) => Expect.fail("Unreachable code"))
   .catchError((e) {
     checkOpenNonExistentFileException(e.error);
     p.toSendPort().send(null);
   });
 }
 
 bool checkWriteReadOnlyFileException(e) {
   Expect.isTrue(e is FileIOException);
   Expect.isTrue(e.osError != null);
@@ skipping 14 matching lines @@
   });
 
   var file = new File("${temp.path}/test_file");
   file.createSync();
   callback(file, p.toSendPort());
 }
 
 
 testWriteByteToReadOnlyFile() {
   createTestFile((file, port) {
-    var openedFile = file.openSync(FileMode.READ);
+    var openedFile = file.openSync(mode: FileMode.READ);
 
     // Writing to read only file should throw an exception.
     Expect.throws(() => openedFile.writeByteSync(0),
                   (e) => checkWriteReadOnlyFileException(e));
 
     var writeByteFuture = openedFile.writeByte(0);
     writeByteFuture.catchError((e) {
       checkWriteReadOnlyFileException(e.error);
       openedFile.close().then((ignore) => port.send(null));
     });
   });
 }
 
 testWriteListToReadOnlyFile() {
   createTestFile((file, port) {
-    var openedFile = file.openSync(FileMode.READ);
+    var openedFile = file.openSync(mode: FileMode.READ);
 
     List data = [0, 1, 2, 3];
     // Writing to read only file should throw an exception.
     Expect.throws(() => openedFile.writeListSync(data, 0, data.length),
                   (e) => checkWriteReadOnlyFileException(e));
 
     var writeListFuture = openedFile.writeList(data, 0, data.length);
     writeListFuture.catchError((e) {
       checkWriteReadOnlyFileException(e.error);
       openedFile.close().then((ignore) => port.send(null));
     });
   });
 }
 
 testTruncateReadOnlyFile() {
   createTestFile((file, port) {
-    var openedFile = file.openSync(FileMode.WRITE);
+    var openedFile = file.openSync(mode: FileMode.WRITE);
     openedFile.writeByteSync(0);
     openedFile.closeSync();
-    openedFile = file.openSync(FileMode.READ);
+    openedFile = file.openSync(mode: FileMode.READ);
 
     // Truncating read only file should throw an exception.
     Expect.throws(() => openedFile.truncateSync(0),
                   (e) => checkWriteReadOnlyFileException(e));
 
     var truncateFuture = openedFile.truncate(0);
     truncateFuture.then((ignore) => Expect.fail("Unreachable code"))
     .catchError((e) {
       checkWriteReadOnlyFileException(e.error);
       openedFile.close().then((ignore) => port.send(null));
     });
   });
 }
 
 bool checkFileClosedException(e) {
   Expect.isTrue(e is FileIOException);
   Expect.isTrue(e.toString().indexOf("File closed") != -1);
   Expect.isTrue(e.osError == null);
   return true;
 }
 
 testOperateOnClosedFile() {
   createTestFile((file, port) {
-    var openedFile = file.openSync(FileMode.READ);
+    var openedFile = file.openSync(mode: FileMode.READ);
     openedFile.closeSync();
 
     List data = [0, 1, 2, 3];
     Expect.throws(() => openedFile.readByteSync(),
                   (e) => checkFileClosedException(e));
     Expect.throws(() => openedFile.writeByteSync(0),
                   (e) => checkFileClosedException(e));
     Expect.throws(() => openedFile.writeListSync(data, 0, data.length),
                   (e) => checkFileClosedException(e));
     Expect.throws(() => openedFile.readListSync(data, 0, data.length),
@@ skipping 97 matching lines @@
   testReadAsBytesNonExistent();
   testReadAsTextNonExistent();
   testReadAsLinesNonExistent();
   testWriteByteToReadOnlyFile();
   testWriteListToReadOnlyFile();
   testTruncateReadOnlyFile();
   testOperateOnClosedFile();
   testRepeatedlyCloseFile();
   testRepeatedlyCloseFileSync();
 }