Specialize closures for 0 and 2 arguments

Change-Id: Ia21249cb9671960eb3e0d96afef5e5efb8ba7ee2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/105200
Commit-Queue: Stephen Adams <sra@google.com>
Reviewed-by: Joshua Litt <joshualitt@google.com>

https://dart.googlesource.com/sdk/+/11991056b6511ed71aacdfebe72664f5632c5238
diff --git a/commits.json b/commits.json
index 51e618c..55f744e 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
   "external/github.com/flutter/engine":"99b752ed2c8f87bb1d13d89a7cee3fb9caa3b1f2",
   "external/github.com/flutter/flutter":"a76eb719dbacac4a91d36212c9b38480b5931197",
-  "sdk":"0999d13ff3ceb5fdd83ea9935065f5c93906b253"
+  "sdk":"11991056b6511ed71aacdfebe72664f5632c5238"
 }
\ No newline at end of file