Roll src/third_party/dart f7902889b6..027071318f (18 commits)

dart-lang/sdk@027071318f [cfe] Change outline test to test strong mode
dart-lang/sdk@363ae34c55 [CFE] Third batch of fixes for requiring explicit types
dart-lang/sdk@e60cbdfd9e [CFE] Add test for running old dills
dart-lang/sdk@de45a83755 [test] Makes spawn_function_custom_class_test more robust.
dart-lang/sdk@f5f942684b Fix invalid literal list element crash
dart-lang/sdk@d153e98447 Revert "[cfe] Gather constraints from both possibilities for FutureOr"
dart-lang/sdk@b99df2be86 [CFE] Language versioning - additional tests
dart-lang/sdk@10e63b7840 [CFE] Get fragment from default package - use language version if any
dart-lang/sdk@27c8d8b7a8 [benchmark] Stop benchmarking fasta in legacy mode.
dart-lang/sdk@464cea0a9f [benchmark] Test dart2js-x continues to work.
dart-lang/sdk@00e9561798 [cfe] Gather constraints from both possibilities for FutureOr
dart-lang/sdk@6e2b3f0326 [vm] Greatly reduce handle allocation during reload.
dart-lang/sdk@56b3dede78 Implement some missed methods for summary2 support
dart-lang/sdk@209c6f8ab9 [pkg:vm_service] fix some analysis errors in the generated vm_service library
dart-lang/sdk@b52b2c3910 [dart2js] Don't produce '-2' for default type argument values with new RTI.
dart-lang/sdk@f37fdef1c2 [vm, service] Fix out-of-bounds access when processing requestHeapSnapshot's arguments.
dart-lang/sdk@5087b99361 Report final re-assignment in for-in parts. Fixes #30486
dart-lang/sdk@0ad703b534 [pkg:vm_service] re-generate the library based on the latest spec

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': 'f7902889b6e30a8b9d71416e1facf3c509aad06f',
+  'dart_revision': '027071318ff1333fefcf7b4e475c10a8f68ebc0d',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -72,7 +72,7 @@ vars = {
   'dart_mustache_tag': '5e81b12215566dbe2473b2afd01a8a8aedd56ad9',
   'dart_oauth2_tag': '1.2.1',
   'dart_observatory_pub_packages_rev': '0894122173b0f98eb08863a7712e78407d4477bc',
-  'dart_package_config_tag': '1.0.5',
+  'dart_package_config_tag': '2453cd2e78c2db56ee2669ced17ce70dd00bf576',
   'dart_package_resolver_tag': '1.0.10',
   'dart_path_tag': '1.6.2',
   'dart_pedantic_tag': 'v1.8.0',

ci/licenses_golden/licenses_third_party

-Signature: 8150fbd17d2122e7cb6fe8fcfb41d8d5
+Signature: 94bb4276408984fa58f0cf5fe27bc7bd
 
 UNUSED LICENSES: