Roll src/third_party/dart 35df96a2e2..d4342b9021 (4 commits)

dart-lang/sdk@d4342b9021 [cfe] Print Kernel's type-parameter types in more details in text
dart-lang/sdk@f10c37b0e5 [cfe] Handle explicit extension instance access.
dart-lang/sdk@8e7812fee5 [CFE] Ability to low-level compare dill bytes
dart-lang/sdk@751059b246 [CFE] Explicit creation; add test to force it

DEPS

@@ -34,7 +34,7 @@ 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': '35df96a2e28703efa67d0f555823f188cc031fb2',
+  'dart_revision': 'd4342b90214e617da26788f33c2795d8103c3592',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py