[CFE/VM] Fix merge/typo for bump to kernel version 29 (#11835)

Before this fix, trying to run a dill with version 28 (with named types
in it) on a new VM would crash.

Change-Id: I47851c236332aa14511f595b4b129e6354b395a7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/113689
Commit-Queue: Jens Johansen <jensj@google.com>
Commit-Queue: Johnni Winther <johnniwinther@google.com>
Auto-Submit: Jens Johansen <jensj@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
diff --git a/DEPS b/DEPS
index 900c2a3..b44dba0 100644
--- a/DEPS
+++ b/DEPS
@@ -34,7 +34,7 @@
   # 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': '79e6c743371a319cfc58bcec76f4ffb3114ef9a9',
+  'dart_revision': '74e4033d316abb6cc2290051ec85534caf4dca54',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py