Get the basics of deferred libraries working.

Get the basics of deferred libraries working.

References to loadLibrary on a library prefix are compiled to a
helper function that returns a Future that always completes
successfully.

The deferred libraries aren't actually deferred, but code that uses
loadLibrary() now doesn't barf.

BUG=#27343
R=vsm@google.com

Committed: https://github.com/dart-lang/dev_compiler/commit/8daf4cfb73aa92c035f360832ccc7218e41d79a1

[Bob Nystrom, 2016-11-05 00:38:06]

rnystrom@google.com changed reviewers:
+ vsm@google.com

[vsm, 2016-11-07 15:31:17]

lgtm!

[Bob Nystrom, 2016-11-07 18:41:28]

Description was changed from

==========
Get the basics of deferred libraries working.

References to loadLibrary on a library prefix are compiled to a
helper function that returns a Future that always completes
successfully.

The deferred libraries aren't actually deferred, but code that uses
loadLibrary() now doesn't barf.

BUG=#27343
==========

to

==========
Get the basics of deferred libraries working.

References to loadLibrary on a library prefix are compiled to a
helper function that returns a Future that always completes
successfully.

The deferred libraries aren't actually deferred, but code that uses
loadLibrary() now doesn't barf.

BUG=#27343
R=vsm@google.com

Committed:
https://github.com/dart-lang/dev_compiler/commit/8daf4cfb73aa92c035f360832ccc...
==========

[Bob Nystrom, 2016-11-07 18:41:29]

Committed patchset #3 (id:40001) manually as
8daf4cfb73aa92c035f360832ccc7218e41d79a1 (presubmit successful).

[Jennifer Messerly, 2016-11-07 20:14:59]

jmesserly@google.com changed reviewers:
+ jmesserly@google.com

[Jennifer Messerly, 2016-11-07 20:15:00]

lgtm