[infra] Update checked in SDK to 3.0.0-417.3.beta.

Change-Id: I0e2deae75c934e06e0c2e7ace42f758cf5507725
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/299662
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Jonas Termansen <sortie@google.com>
diff --git a/DEPS b/DEPS
index 6f2ee83..7d944ff 100644
--- a/DEPS
+++ b/DEPS
@@ -44,9 +44,9 @@
   "fuchsia_git": "https://fuchsia.googlesource.com",
 
   # Checked-in SDK version. The checked-in SDK is a Dart SDK distribution in a
-  # cipd package used to run Dart scripts in the build and test infrastructure.
-  # Contact dart-engprod@ if you need a checked-in SDK roll.
-  "sdk_tag": "version:3.0.0-417.2.beta",
+  # cipd package used to run Dart scripts in the build and test infrastructure,
+  # which is automatically built on the release commits.
+  "sdk_tag": "git_revision:d2b8bf9c2ec1bd479dfd255ae70a62aa723df931",
 
   # co19 is a cipd package. Use update.sh in tests/co19[_2] to update these
   # hashes.
@@ -218,7 +218,7 @@
            "@" + Var("benchmarks_internal_rev"),
     "condition": "checkout_benchmarks_internal",
   },
-  Var("dart_root") + "/tools/sdks": {
+  Var("dart_root") + "/tools/sdks/dart-sdk": {
       "packages": [{
           "package": "dart/dart-sdk/${{platform}}",
           "version": Var("sdk_tag"),