Remove Encoding-enum from dart:io and add interface in dart:convert.

pkg/http/lib/src/utils.dart

Index: pkg/http/lib/src/utils.dart
diff --git a/pkg/http/lib/src/utils.dart b/pkg/http/lib/src/utils.dart
index 420a3d55441a7ffe25e8188a45db378cdff1dc3c..c1f74be4426b4fa6e9f110e9a9e2c124cf477cf1 100644
--- a/pkg/http/lib/src/utils.dart
+++ b/pkg/http/lib/src/utils.dart
@@ -5,9 +5,9 @@
 library utils;
 
 import 'dart:async';
+import 'dart:convert';
 import 'dart:io';
 import 'dart:typed_data';
-import 'dart:utf';
 
 import 'byte_stream.dart';
 
@@ -66,9 +66,9 @@ List<String> split1(String toSplit, String pattern) {
 /// [charset] is null or if no [Encoding] was found that corresponds to
 /// [charset].
 Encoding encodingForCharset(
-    String charset, [Encoding fallback = Encoding.ISO_8859_1]) {
+    String charset, [Encoding fallback = LATIN1]) {
   if (charset == null) return fallback;
-  var encoding = Encoding.fromName(charset);
+  var encoding = encodingFromName(charset);
   return encoding == null ? fallback : encoding;
 }
 
@@ -77,21 +77,19 @@ Encoding encodingForCharset(
 /// [FormatException] if no [Encoding] was found that corresponds to [charset].
 /// [charset] may not be null.
 Encoding requiredEncodingForCharset(String charset) {
-  var encoding = Encoding.fromName(charset);
+  var encoding = encodingFromName(charset);
   if (encoding != null) return encoding;
   throw new FormatException('Unsupported encoding "$charset".');
 }
 
 /// Converts [bytes] into a [String] according to [encoding].
 String decodeString(List<int> bytes, Encoding encoding) {

[nweiz, 2013/08/23 19:40:00]

This (and [encodeString] should just be replaced with manually calling
[encoding.decode].

[floitsch, 2013/08/26 09:33:40]

Done.

-  // TODO(nweiz): implement this once issue 6284 is fixed.
-  return decodeUtf8(bytes);
+  return encoding.decode(bytes);
 }
 
 /// Converts [string] into a byte array according to [encoding].
 List<int> encodeString(String string, Encoding encoding) {
-  // TODO(nweiz): implement this once issue 6284 is fixed.
-  return encodeUtf8(string);
+  return encoding.encode(string);
 }
 
 /// A regular expression that matches strings that are composed entirely of