Manual Dart roll...

Manual Dart roll fa4379946109467c8a48f20f19d83d7c72968a3e...d45c3d15cb3cea0104a87697c085259666eec528 (#13761)

dart-lang/sdk@d45c3d15cb [VM/nnbd] Make Nullability and NNBDMode class enums to avoid name conflicts.
dart-lang/sdk@cfec969eff Update dartdoc version to 0.29.1.
dart-lang/sdk@e3e0ef8548 Make explanations for unchanged types optional and disabled by default
dart-lang/sdk@e39b0f8d99 Disallow a deferred import of a library with extensions if any extensions are visible
dart-lang/sdk@9c983d2ee3 [cfe] Support extensions via prefix
dart-lang/sdk@5f5ce5d119 Include type parameter bounds into string expections for subtyping.
dart-lang/sdk@dc69edcdb3 NullabilityEliminator for removing nullabilities in legacy libraries.
dart-lang/sdk@7ad7e6202d Allow extensions imported with a prefix to be accessible
dart-lang/sdk@ea57b1e62c [VM/nnbd] Pass nullability when creating Class::DeclarationType.

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': 'fa4379946109467c8a48f20f19d83d7c72968a3e',
+  'dart_revision': 'd45c3d15cb3cea0104a87697c085259666eec528',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -231,7 +231,7 @@ deps = {
    Var('dart_git') + '/dart2js_info.git' + '@' + Var('dart_dart2js_info_tag'),
 
   'src/third_party/dart/third_party/pkg/dartdoc':
-   Var('dart_git') + '/dartdoc.git@v0.29.0',
+   Var('dart_git') + '/dartdoc.git@v0.29.1',
 
   'src/third_party/dart/third_party/pkg/ffi':
    Var('dart_git') + '/ffi.git' + '@' + Var('dart_ffi_tag'),

ci/licenses_golden/licenses_third_party

-Signature: 2c3233e5e7d7eec7f5757567f2cd61a7
+Signature: 9355024c19864ce227141256962ef660
 
 UNUSED LICENSES: