Elements. Migrate lib/src/dart/element/member.dart

Change-Id: I0742dfd74557999c29bd660400c267c35442375d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/419062
Reviewed-by: Paul Berry <paulberry@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>

https://dart.googlesource.com/sdk/+/15a022bcb24cc9de1ae0dc6be1549193575f3ffc

DEPS

diff --git a/DEPS b/DEPS
index 4b4f9b7..5b5e3a6 100644
--- a/DEPS
+++ b/DEPS
@@ -238,7 +238,7 @@
 ]
 
 deps = {
-  'flutter/engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + 'd56749cc34cbe6abf8f5efbe4c6fec8c83abd428',
+  'flutter/engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + '15a022bcb24cc9de1ae0dc6be1549193575f3ffc',
 
   'flutter': Var('flutter_git') + '/mirrors/flutter' + '@' + 'a0b1b3253416b1f19e3f105b596eb6e4c5813ef4',
 

commits.json

diff --git a/commits.json b/commits.json
index becb549..ff73789 100644
--- a/commits.json
+++ b/commits.json
@@ -1,4 +1,4 @@
 {
   "flutter":"a0b1b3253416b1f19e3f105b596eb6e4c5813ef4",
-  "flutter/engine/src/flutter/third_party/dart":"d56749cc34cbe6abf8f5efbe4c6fec8c83abd428"
+  "flutter/engine/src/flutter/third_party/dart":"15a022bcb24cc9de1ae0dc6be1549193575f3ffc"
 }
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