Roll src/third_party/dart 02a8b01..98c13ba (5 commits) (#14280)

dart-lang/sdk@98c13ba18f [vm/precomp] Reduce arm-32 code size in BoxInt64Instr
dart-lang/sdk@37b6b86b90 [infra] Change the name of the num_chunks attribute sent to pubsub.
dart-lang/sdk@a846098c18 [vm] Enable ELF loader to read snapshots from memory without any backing file.
dart-lang/sdk@bbd850eac8 Tweak the CHANGELOG for 2.7.0.
dart-lang/sdk@9456316b51 ErrorReporter should know isNonNullableByDefault.

Author: bkonyi

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': '02a8b015ada14d556cc5683970d2ccab351b679c',
+  'dart_revision': '98c13ba18f42b2efd3b9330ee05e1ddad08d816c',
 
   # 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

@@ -1,4 +1,4 @@
-Signature: 387e5572f4d5397cd2535ecdfd59a341
+Signature: 11786b18ee722ed30adc6af4a31201a6
 
 UNUSED LICENSES: