Add writeString method to OutputStream

tests/standalone/src/io/HttpTest.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
 
 #import("dart:isolate");
@@ skipping 86 matching lines @@
     Expect.equals("POST", request.method);
     response.contentLength = request.contentLength;
     request.inputStream.pipe(response.outputStream);
   }
 
   // Echo the request content back to the response.
   void _zeroToTenHandler(HttpRequest request, HttpResponse response) {
     Expect.equals("GET", request.method);
     request.inputStream.onData = () {};
     request.inputStream.onClosed = () {
-      response.writeString("01234567890");
+      response.outputStream.writeString("01234567890");
       response.outputStream.close();
     };
   }
 
   // Return a 404.
   void _notFoundHandler(HttpRequest request, HttpResponse response) {
     response.statusCode = HttpStatus.NOT_FOUND;
     response.setHeader("Content-Type", "text/html; charset=UTF-8");
-    response.writeString("Page not found");
+    response.outputStream.writeString("Page not found");
     response.outputStream.close();
   }
 
   // Return a 301 with a custom reason phrase.
   void _reasonForMovingHandler(HttpRequest request, HttpResponse response) {
     response.statusCode = HttpStatus.MOVED_PERMANENTLY;
     response.reasonPhrase = "Don't come looking here any more";
     response.outputStream.close();
   }
 
@@ skipping 126 matching lines @@
   TestServerMain testServerMain = new TestServerMain();
 
   void runTest(int port) {
     int count = 0;
     HttpClient httpClient = new HttpClient();
     void sendRequest() {
       HttpClientConnection conn =
           httpClient.post("127.0.0.1", port, "/echo");
       conn.onRequest = (HttpClientRequest request) {
         if (chunkedEncoding) {
-          request.writeString(data.substring(0, 10));
-          request.writeString(data.substring(10, data.length));
+          request.outputStream.writeString(data.substring(0, 10));
+          request.outputStream.writeString(data.substring(10, data.length));
         } else {
           request.contentLength = data.length;
           request.outputStream.write(data.charCodes());
         }
         request.outputStream.close();
       };
       conn.onResponse = (HttpClientResponse response) {
         Expect.equals(HttpStatus.OK, response.statusCode);
         StringInputStream stream = new StringInputStream(response.inputStream);
         StringBuffer body = new StringBuffer();
@@ skipping 29 matching lines @@
   TestServerMain testServerMain = new TestServerMain();
 
   void runTest(int port) {
     int count = 0;
     HttpClient httpClient = new HttpClient();
     void sendRequest() {
       HttpClientConnection conn =
           httpClient.post("127.0.0.1", port, "/echo");
       conn.onRequest = (HttpClientRequest request) {
         if (chunkedEncoding) {
-          request.writeString(data.substring(0, 10));
-          request.writeString(data.substring(10, data.length));
+          request.outputStream.writeString(data.substring(0, 10));
+          request.outputStream.writeString(data.substring(10, data.length));
         } else {
           request.contentLength = data.length;
           request.outputStream.write(data.charCodes());
         }
         request.outputStream.close();
       };
       conn.onResponse = (HttpClientResponse response) {
         Expect.equals(HttpStatus.OK, response.statusCode);
         InputStream stream = response.inputStream;
         List<int> body = new List<int>();
@@ skipping 33 matching lines @@
   TestServerMain testServerMain = new TestServerMain();
 
   void runTest(int port) {
     int count = 0;
     HttpClient httpClient = new HttpClient();
     void sendRequest() {
       HttpClientConnection conn =
           httpClient.post("127.0.0.1", port, "/echo");
       conn.onRequest = (HttpClientRequest request) {
         if (chunkedEncoding) {
-          request.writeString(data.substring(0, 10));
-          request.writeString(data.substring(10, data.length));
+          request.outputStream.writeString(data.substring(0, 10));
+          request.outputStream.writeString(data.substring(10, data.length));
         } else {
           request.contentLength = data.length;
           request.outputStream.write(data.charCodes());
         }
         request.outputStream.close();
       };
       conn.onResponse = (HttpClientResponse response) {
         Expect.equals(HttpStatus.OK, response.statusCode);
         InputStream stream = response.inputStream;
         List<int> body = new List<int>();
@@ skipping 133 matching lines @@
   testPOST(false);
   testReadInto(true);
   testReadInto(false);
   testReadShort(true);
   testReadShort(false);
   test404();
   testReasonPhrase();
   testHost();
   testExpires();
 }