Deprecate InterfaceType.constructors2, use constructors instead.

Change-Id: I2d63bc1b61acb781ad0b8a45f15a05d36ee3a304
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/435748
Reviewed-by: Paul Berry <paulberry@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>

https://dart.googlesource.com/sdk/+/98f233bfa725ed83d30d630b3f72ab6214cc05dd

DEPS

diff --git a/DEPS b/DEPS
index 3d49c8f..a4bba73 100644
--- a/DEPS
+++ b/DEPS
@@ -235,7 +235,7 @@
 ]
 
 deps = {
-  'flutter/engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + '528b01e69e52d143ea520298f37e73388b90aff7',
+  'flutter/engine/src/flutter/third_party/dart': Var('dart_git') + '/sdk' + '@' + '98f233bfa725ed83d30d630b3f72ab6214cc05dd',
 
   'flutter': Var('flutter_git') + '/mirrors/flutter' + '@' + '8d89d1edac74acdf9196c6a8e03485bc4714f1ee',
 

commits.json

diff --git a/commits.json b/commits.json
index 006886a..d45dd3c 100644
--- a/commits.json
+++ b/commits.json
@@ -1,4 +1,4 @@
 {
   "flutter":"8d89d1edac74acdf9196c6a8e03485bc4714f1ee",
-  "flutter/engine/src/flutter/third_party/dart":"528b01e69e52d143ea520298f37e73388b90aff7"
+  "flutter/engine/src/flutter/third_party/dart":"98f233bfa725ed83d30d630b3f72ab6214cc05dd"
 }
\ No newline at end of file