Update the streams interfaces

tests/standalone/src/ProcessStdoutTest.dart

 // Copyright (c) 2011, 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.
 //
 // Process test program to test process communication.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 class ProcessStdoutTest {
 
-  static void testExit() {
+  static void testStdout() {
     Process process = new Process("out/Debug_ia32//process_test",
                                    const ["0", "1", "99", "0"]);
     final int BUFFERSIZE = 10;
     final int STARTCHAR = 65;
-    List<int> buffer = new List<int>(BUFFERSIZE);
+    List<int> data = new List<int>(BUFFERSIZE);
     for (int i = 0; (i < BUFFERSIZE - 1); i++) {
-      buffer[i] = STARTCHAR + i;
+      data[i] = STARTCHAR + i;
     }
-    buffer[BUFFERSIZE - 1] = 10;
+    data[BUFFERSIZE - 1] = 10;
 
     InputStream input = process.stdout;
     OutputStream output = process.stdin;
 
     process.start();
 
-    List<int> readBuffer = new List<int>(BUFFERSIZE);
+    int received = 0;
 
     void dataWritten() {
       void readData() {
-        for (int i = 0; i < BUFFERSIZE; i++) {
-          Expect.equals(buffer[i], readBuffer[i]);
+        List<int> buffer = input.read();
+        for (int i = 0; i < buffer.length; i++) {
+          Expect.equals(data[received + i], buffer[i]);
         }
-        process.close();
+        received += buffer.length;
+        if (received == BUFFERSIZE) {
+          process.close();
+        }
       }
 
-      bool read = input.read(readBuffer, 0, BUFFERSIZE, readData);
-      if (read) {
-        readData();
+      void streamClosed() {
+        Expect.equals(BUFFERSIZE, received);
       }
+
+      input.dataHandler = readData;
+      input.closeHandler = streamClosed;
     }
-    bool written = output.write(buffer, 0, BUFFERSIZE, dataWritten);
+
+    bool written = output.write(data, 0, BUFFERSIZE, dataWritten);
     if (written) {
       dataWritten();
     }
   }
 
   static void testMain() {
-    testExit();
+    testStdout();
   }
 }
 
 main() {
   ProcessStdoutTest.testMain();
 }