Move back to having File.open{Input,Output}Stream return the stream directly.

tests/standalone/src/StreamPipeTest.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.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 #library("StreamPipeTest");
@@ skipping 64 matching lines @@
     });
   }
 
   void runTest() {
 
     void connectHandler() {
       String srcFileName =
           getDataFilename("tests/standalone/src/readline_test1.dat");
 
       SocketOutputStream socketOutput = _socket.outputStream;
-      InputStream fileInput = new File(srcFileName).openInputStreamSync();
+      InputStream fileInput = new File(srcFileName).openInputStream();
 
       fileInput.closeHandler = () {
         SocketInputStream socketInput = _socket.inputStream;
         var tempDir = new Directory('');
         tempDir.createTempSync();
         var dstFileName = tempDir.path + "/readline_test1.dat";
         var dstFile = new File(dstFileName);
         dstFile.createSync();
-        var fileOutput = dstFile.openOutputStreamSync();
+        var fileOutput = dstFile.openOutputStream();
 
         socketInput.closeHandler = () {
           // Check that the resulting file is equal to the initial
           // file.
           bool result = compareFileContent(srcFileName, dstFileName);
           fileOutput.closeHandler = () {
             new File(dstFileName).deleteSync();
             tempDir.deleteSync();
             Expect.isTrue(result);
 
@@ skipping 57 matching lines @@
 // Test piping from one file to another and closing both streams
 // after wards.
 testFileToFilePipe1() {
   // Force test to timeout if one of the handlers is
   // not called.
   ReceivePort donePort = new ReceivePort.singleShot();
   donePort.receive((message, ignore) {});
 
   String srcFileName =
       getDataFilename("tests/standalone/src/readline_test1.dat");
-  var srcStream = new File(srcFileName).openInputStreamSync();
+  var srcStream = new File(srcFileName).openInputStream();
 
   var tempDir = new Directory('');
   tempDir.createTempSync();
   String dstFileName = tempDir.path + "/readline_test1.dat";
   new File(dstFileName).createSync();
-  var dstStream = new File(dstFileName).openOutputStreamSync();
+  var dstStream = new File(dstFileName).openOutputStream();
 
   dstStream.closeHandler = () {
     bool result = compareFileContent(srcFileName, dstFileName);
     new File(dstFileName).deleteSync();
     tempDir.deleteSync();
     Expect.isTrue(result);
     donePort.toSendPort().send(null);
   };
 
   srcStream.pipe(dstStream);
 }
 
 
 // Test piping from one file to another and write additional data to
 // the output stream after piping finished.
 testFileToFilePipe2() {
   // Force test to timeout if one of the handlers is
   // not called.
   ReceivePort donePort = new ReceivePort.singleShot();
   donePort.receive((message, ignore) {});
 
   String srcFileName =
       getDataFilename("tests/standalone/src/readline_test1.dat");
   var srcFile = new File(srcFileName);
-  var srcStream = srcFile.openInputStreamSync();
+  var srcStream = srcFile.openInputStream();
 
   var tempDir = new Directory('');
   tempDir.createTempSync();
   var dstFileName = tempDir.path + "/readline_test1.dat";
   var dstFile = new File(dstFileName);
   dstFile.createSync();
-  var dstStream = dstFile.openOutputStreamSync();
+  var dstStream = dstFile.openOutputStream();
 
   srcStream.closeHandler = () {
     dstStream.write([32]);
     dstStream.close();
     dstStream.closeHandler = () {
       var src = srcFile.openSync();
       var dst = dstFile.openSync();
       var srcLength = src.lengthSync();
       var dstLength = dst.lengthSync();
       Expect.equals(srcLength + 1, dstLength);
@@ skipping 19 matching lines @@
 // Test piping two copies of one file to another.
 testFileToFilePipe3() {
   // Force test to timeout if one of the handlers is
   // not called.
   ReceivePort donePort = new ReceivePort.singleShot();
   donePort.receive((message, ignore) {});
 
   String srcFileName =
       getDataFilename("tests/standalone/src/readline_test1.dat");
   var srcFile = new File(srcFileName);
-  var srcStream = srcFile.openInputStreamSync();
+  var srcStream = srcFile.openInputStream();
 
   var tempDir = new Directory('');
   tempDir.createTempSync();
   var dstFileName = tempDir.path + "/readline_test1.dat";
   var dstFile = new File(dstFileName);
   dstFile.createSync();
-  var dstStream = dstFile.openOutputStreamSync();
+  var dstStream = dstFile.openOutputStream();
 
   srcStream.closeHandler = () {
-    var srcStream2 = srcFile.openInputStreamSync();
+    var srcStream2 = srcFile.openInputStream();
 
     dstStream.closeHandler = () {
       var src = srcFile.openSync();
       var dst = dstFile.openSync();
       var srcLength = src.lengthSync();
       var dstLength = dst.lengthSync();
       Expect.equals(srcLength * 2, dstLength);
       Expect.isTrue(compareFileContent(srcFileName,
                                        dstFileName,
                                        count: srcLength));
@@ skipping 15 matching lines @@
   srcStream.pipe(dstStream, close: false);
 }
 
 
 main() {
   testFileToFilePipe1();
   testFileToFilePipe2();
   testFileToFilePipe3();
   PipeServerGame echoServerGame = new PipeServerGame.start();
 }