Fix handling of inline JS types in DDC.

Fix handling of inline JS types in DDC.

DDC was incorrectly interpreting inline JS types, and hence marking
some things as non-nullable which were nullable.  This fixes that, and
also slightly improves the analyzers treatment of inline JS types.
Also fixes some incorrect inline JS type annotations in DDC patch
files.


BUG=
R=vsm@google.com

Committed: https://github.com/dart-lang/sdk/commit/24f94785502bed25030acb98f64edd5ce5c20eee

[Leaf, 2017-06-29 21:47:46]

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

[vsm, 2017-06-29 22:57:43]

lgtm

[Leaf, 2017-06-29 23:02:14]

Description was changed from

==========
Fix handling of inline JS types in DDC.

DDC was incorrectly interpreting inline JS types, and hence marking
some things as non-nullable which were nullable.  This fixes that, and
also slightly improves the analyzers treatment of inline JS types.
Also fixes some incorrect inline JS type annotations in DDC patch
files.


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

to

==========
Fix handling of inline JS types in DDC.

DDC was incorrectly interpreting inline JS types, and hence marking
some things as non-nullable which were nullable.  This fixes that, and
also slightly improves the analyzers treatment of inline JS types.
Also fixes some incorrect inline JS type annotations in DDC patch
files.


BUG=
R=vsm@google.com

Committed:
https://github.com/dart-lang/sdk/commit/24f94785502bed25030acb98f64edd5ce5c20eee
==========

[Leaf, 2017-06-29 23:02:15]

Committed patchset #1 (id:1) manually as
24f94785502bed25030acb98f64edd5ce5c20eee (presubmit successful).