Dart SDK roll for 2019-01-08

efdbeb8059 [vm] Repair JIT snapshots generated from gen_snapshot.
8f33211f25 Fix typo in import, was using path
e5c32261da Add note about new Literal codes
303b3a96a7 Use ExperimentStatus field in summary / resynthesize tests.
52a159de5c Change AnalysisContext.analysisOptions setter to just remembering the AnalysisOptions object.
e9eb4842ea Remove the unused hint code INVALID_ASSIGNMENT
253b0cc1e3 [dartdevc] improve cast failoure error message
2ca417aff1 Initial support for recording nullability in types
f54ac41ce1 Ensure LSP server advertises it has QuickFixes
9dbb6fb113 Add a Hint enforcing contract of @literal

DEPS

@@ -31,7 +31,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/master/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': '2cb346bd0cce075a5b7988cedb678e822a1d50f4',
+  'dart_revision': 'efdbeb80597a8825be82ce5d2198940a0ab771c2',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py

ci/licenses_golden/licenses_third_party

-Signature: 1151287898856aac5ec88018bdb049ab
+Signature: e79cbea349a746d74a3b7e4396dc3191
 
 UNUSED LICENSES: