Serialize binary barback assets using typed arrays.

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 dd3547d54926e1c4ce7f09363084e58379405cd6..64c50c4269e0c0e9c6a09701c0f1ec7465811625 100644
--- a/pkg/http/lib/src/utils.dart
+++ b/pkg/http/lib/src/utils.dart
@@ -107,17 +107,13 @@ final RegExp _ASCII_ONLY = new RegExp(r"^[\x00-\x7F]+$");
 /// characters.
 bool isPlainAscii(String string) => _ASCII_ONLY.hasMatch(string);
 
-/// Converts [input] into a [Uint8List]. If [input] is a [TypedData], 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 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 (input is TypedData) return new Uint8List.view(input.buffer);
+  return new Uint8List.fromList(input);
 }
 
 /// If [stream] is already a [ByteStream], returns it. Otherwise, wraps it in a