Roll Dart SDK from e62b89c to b0d2b97 (4 revisions)

https://dart.googlesource.com/sdk.git/+log/e62b89c56d01..b0d2b97d2cd7

2020-06-11 [email protected] [co19] Roll co19 to b071a4729a57ee47dcc7330ab9ea3566ef58e5c2
2020-06-11 [email protected] [vm/kernel] Add options to generate Fuchsia manifest to gen_kernel tool
2020-06-11 [email protected] [infra] Remove remaining GSUtil.GSUTIL_IS_SHELL_SCRIPT reference
2020-06-11 [email protected] Update nnbd_migration README with more details.

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dart-sdk-flutter-engine
Please CC [email protected] on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Author: skia-flutter-autoroll

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': 'e62b89c56d0160fa31459a5fd86acd157df623e3',
+  'dart_revision': 'b0d2b97d2cd721f0ef4400e8231194d11c70a17e',
 
   # 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: ad0515ded5a6b00b10de720d9d07e5b1
+Signature: 3c05c6928037b9f7c271bb988a01e09b
 
 UNUSED LICENSES: