Use BytesBuilder in pkg:http, when accumulating binary data.

pkg/http/lib/src/byte_stream.dart

Index: pkg/http/lib/src/byte_stream.dart
diff --git a/pkg/http/lib/src/byte_stream.dart b/pkg/http/lib/src/byte_stream.dart
index c75654a28e9b656dc5877582904d289f472179ef..a15475745d5cc048fc196902ebbdbd200724e958 100644
--- a/pkg/http/lib/src/byte_stream.dart
+++ b/pkg/http/lib/src/byte_stream.dart
@@ -23,11 +23,8 @@ class ByteStream extends StreamView<List<int>> {
 
   /// Collects the data of this stream in a [Uint8List].
   Future<Uint8List> toBytes() {
-    /// TODO(nweiz): use BufferList when issue 6409 is fixed.
-    return fold(<int>[], (buffer, chunk) {
-      buffer.addAll(chunk);
-      return buffer;
-    }).then(toUint8List);
+    return fold(new BytesBuilder(), (builder, chunk) => builder..add(chunk))
+      .then((builder) => builder.takeBytes());

[nweiz, 2013/11/01 18:31:19]

Indent this two more spaces.

[Anders Johnsen, 2013/11/04 07:13:34]

Done: https://codereview.chromium.org/57653002

   }
 
   /// Collect the data of this stream in a [String], decoded according to