Revert "Tree-shaker: Use insertion in the work queue instead of "was compiled" as the criterion to …

Revert "Tree-shaker: Use insertion in the work queue instead of "was compiled" as the criterion to retain a function."

This reverts commit 908309fe6d239f80711ca4329367974c0265e52f.

Committed: https://github.com/dart-lang/sdk/commit/8c87121afe740e8c9d58a976ab5cacf6ba476231

[rmacnak, 2016-08-03 16:34:03]

rmacnak@google.com changed reviewers:
+ fschneider@google.com

[rmacnak, 2016-08-03 16:34:14]

Description was changed from

==========
Revert "Tree-shaker: Use insertion in the work queue instead of "was compiled"
as the criterion to retain a function."

This reverts commit 908309fe6d239f80711ca4329367974c0265e52f.
==========

to

==========
Revert "Tree-shaker: Use insertion in the work queue instead of "was compiled"
as the criterion to retain a function."

This reverts commit 908309fe6d239f80711ca4329367974c0265e52f.

Committed:
https://github.com/dart-lang/sdk/commit/8c87121afe740e8c9d58a976ab5cacf6ba476231
==========

[rmacnak, 2016-08-03 16:34:15]

Committed patchset #1 (id:1) manually as
8c87121afe740e8c9d58a976ab5cacf6ba476231 (presubmit successful).

[Florian Schneider, 2016-08-03 17:04:40]

lgtm