Uses a HashMap to complete deferred library loads.

Uses a HashMap to complete deferred library loads.

HashMap.forEach is a few ms faster to compile than LinkedHashMap.forEach,
and iteration order appears not to matter for _outstandingLoadRequests.

BUG=
R=hausner@google.com

Committed: https://github.com/dart-lang/sdk/commit/871e4a2788cb1ddceac741e815c272a9c45c4680

[zra, 2015-11-16 22:19:14]

Description was changed from

==========
Uses a HashMap to complete deferred library loads.

HashMap.forEach is much faster to compile than LinkedHashMap.forEach,
and iteration order appears not to matter for
_outstandingLoadRequests.

BUG=
==========

to

==========
Uses a HashMap to complete deferred library loads.

HashMap.forEach is a few ms faster to compile than LinkedHashMap.forEach,
and iteration order appears not to matter for
_outstandingLoadRequests.

BUG=
==========

[zra, 2015-11-16 22:19:36]

Description was changed from

==========
Uses a HashMap to complete deferred library loads.

HashMap.forEach is a few ms faster to compile than LinkedHashMap.forEach,
and iteration order appears not to matter for
_outstandingLoadRequests.

BUG=
==========

to

==========
Uses a HashMap to complete deferred library loads.

HashMap.forEach is a few ms faster to compile than LinkedHashMap.forEach,
and iteration order appears not to matter for _outstandingLoadRequests.

BUG=
==========

[zra, 2015-11-16 22:20:10]

zra@google.com changed reviewers:
+ hausner@google.com

[hausner, 2015-11-17 18:35:28]

lgtm

[zra, 2015-11-17 18:52:47]

Committed patchset #1 (id:1) manually as
871e4a2788cb1ddceac741e815c272a9c45c4680 (presubmit successful).