Make my pkg packages warning-clean.

pkg/http/lib/src/utils.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.
 
 library utils;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:typed_data';
 import 'dart:utf';
@@ skipping 95 matching lines @@
 }
 
 /// A regular expression that matches strings that are composed entirely of
 /// ASCII-compatible characters.
 final RegExp _ASCII_ONLY = new RegExp(r"^[\x00-\x7F]+$");
 
 /// Returns whether [string] is composed entirely of ASCII-compatible
 /// characters.
 bool isPlainAscii(String string) => _ASCII_ONLY.hasMatch(string);
 
-/// Converts [input] into a [Uint8List]. If [input] is a [ByteArray] or
-/// [ByteArrayViewable], this just returns a view on [input].
+/// Converts [input] into a [Uint8List]. If [input] is a [TypedData], this just
+/// returns a view on [input].
 Uint8List toUint8List(List<int> input) {
   if (input is Uint8List) return input;
-  if (input is ByteData) return new Uint8List.view(input.buffer);
+  if (input is TypedData) {
+    // TODO(nweiz): remove this "as" check when issue 11080 is fixed.
+    return new Uint8List.view((input as TypedData).buffer);
+  }
   var output = new Uint8List(input.length);
   output.setRange(0, input.length, input);
   return output;
 }
 
 /// If [stream] is already a [ByteStream], returns it. Otherwise, wraps it in a
 /// [ByteStream].
 ByteStream toByteStream(Stream<List<int>> stream) {
   if (stream is ByteStream) return stream;
   return new ByteStream(stream);
@@ skipping 102 matching lines @@
 /// The return values of all [Future]s are discarded. Any errors will cause the
 /// iteration to stop and will be piped through the return value.
 Future forEachFuture(Iterable input, Future fn(element)) {
   var iterator = input.iterator;
   Future nextElement(_) {
     if (!iterator.moveNext()) return new Future.value();
     return fn(iterator.current).then(nextElement);
   }
   return nextElement(null);
 }