add extension method header parser recovery

Change-Id: Ia7424a467014471c01eb30604a062430de42f84d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/103580
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Dan Rubel <danrubel@google.com>

https://dart.googlesource.com/sdk/+/1ffcccd9cc96ebdcf807cf8b774b1c4dd7fe5009
diff --git a/commits.json b/commits.json
index c2aa312..71150f6 100644
--- a/commits.json
+++ b/commits.json
@@ -1,5 +1,5 @@
 {
   "external/github.com/flutter/engine":"333042cf308593b7d4d121ad8f48b42460c4a401",
   "external/github.com/flutter/flutter":"552e74770da213b4d81a19bcbc525e1253c88753",
-  "sdk":"db367542b350c2ccd1c7d40251e47c6f04edc05e"
+  "sdk":"1ffcccd9cc96ebdcf807cf8b774b1c4dd7fe5009"
 }
\ No newline at end of file