dart:typed_data sublist and other methods return inconsistent implementation types in Dartium and Dart2JS

[vsmenon]

Dartium's sublist returns a typed_data list. Dart2JS returns a non typed_data list.

The API only promises a List: http://api.dartlang.org/docs/releases/latest/dart_typed_data/Int8List.html#sublist

This leads to surprising behavior:

Sami Ylönen <sami.ylonen@gmail.com>

to misc
At the moment it seems that if i want my code to work both on dartium and chrome, i have to do this:
new Uint8List.fromList(new Uint8List.view(buffer).sublist(read, read+toRead));
sublist returns List<int> which seems to work on dartium but chrome throws exception when attempting to access lengthInBytes since the object is now JSArray

[kasperl]

cc @vsmenon.

[kasperl]

Hehe. I missed the fact that this was filed by Vijay.

[floitschG]

Dart2js' library should behave the same way as Dartium.

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Added Ready-to-implement, Accepted labels.

[rakudrama]

Fix available https://codereview.chromium.org/18391002/

[vsmenon]

Stephen: is this issue now fixed?

[lrhn]

Added AssumedStale label.