dart2js has its own snapshot.

dart/sdk/bin/dart2js

Index: dart/sdk/bin/dart2js
diff --git a/dart/sdk/bin/dart2js b/dart/sdk/bin/dart2js
index 2baaba762ffef2f09f8722b7fe25e6cdd24faaef..04a316ef32a13941c3237664def2e8a9e93dc1a8 100755
--- a/dart/sdk/bin/dart2js
+++ b/dart/sdk/bin/dart2js
@@ -24,7 +24,7 @@ DART2JS="$SDK_DIR/lib/_internal/compiler/implementation/dart2js.dart"
 DART="$BIN_DIR/dart"
 
 SNAPSHOT_DIR="$BIN_DIR/snapshots"
-SNAPSHOT="$SNAPSHOT_DIR/utils_wrapper.dart.snapshot"
+SNAPSHOT="$SNAPSHOT_DIR/dart2js.dart.snapshot"
 
 unset EXTRA_OPTIONS
 declare -a EXTRA_OPTIONS
@@ -57,8 +57,7 @@ case $0 in
 esac
 
 if test -f "$SNAPSHOT"; then
-  exec "$DART" "${EXTRA_VM_OPTIONS[@]}" "$SNAPSHOT" "dart2js" \
-      "${EXTRA_OPTIONS[@]}" "$@"
+  exec "$DART" "${EXTRA_VM_OPTIONS[@]}" "$SNAPSHOT" "${EXTRA_OPTIONS[@]}" "$@"
 else
   exec "$DART" "${EXTRA_VM_OPTIONS[@]}" "$DART2JS" "${EXTRA_OPTIONS[@]}" "$@"
 fi