Hide some names from package:collection.

Hide some names from package:collection.

This prepares for https://codereview.chromium.org/1994743003/, which
moves some of these functions into the collection package. Once that
lands, we'll add a follow-up CL to use those APIs from collection.

R=jakemac@google.com

Committed: https://github.com/dart-lang/test/commit/f022729f3b24209b798d8fe324dd55e73f238607

[jakemac, 2016-05-19 19:07:30]

lgtm

[nweiz, 2016-05-19 19:14:12]

Description was changed from

==========
Hide some names from package:collection.

This prepares for https://codereview.chromium.org/1994743003/, which
moves some of these functions into the collection package. Once that
lands, we'll add a follow-up CL to use those APIs from collection.

R=jakemac@google.com
==========

to

==========
Hide some names from package:collection.

This prepares for https://codereview.chromium.org/1994743003/, which
moves some of these functions into the collection package. Once that
lands, we'll add a follow-up CL to use those APIs from collection.

R=jakemac@google.com

Committed:
https://github.com/dart-lang/test/commit/f022729f3b24209b798d8fe324dd55e73f23...
==========

[nweiz, 2016-05-19 19:14:13]

Committed patchset #1 (id:1) manually as
f022729f3b24209b798d8fe324dd55e73f238607 (presubmit successful).