Merge kernel closure conversion into the Dart SDK

pkg/kernel/test/type_propagation_selfcheck.dart

Index: pkg/kernel/test/type_propagation_selfcheck.dart
diff --git a/pkg/kernel/test/type_propagation_selfcheck.dart b/pkg/kernel/test/type_propagation_selfcheck.dart
index f5ce2935241a01e2cfe1676884570d4addc0ff0c..e83e4b7f86f9ac2645901586fca52440384dab4c 100644
--- a/pkg/kernel/test/type_propagation_selfcheck.dart
+++ b/pkg/kernel/test/type_propagation_selfcheck.dart
@@ -155,9 +155,7 @@ class SelfCheckTransformer {
     // is allowed to occur.  We use this because it is hard to check directly
     // that a value is of the 'other' type.
     bool disallowOtherValues = expected.valueBits & ValueBit.other == 0;
-    List<Expression> anyChecks = disallowOtherValues
-        ? <Expression>[]
-        : null;
+    List<Expression> anyChecks = disallowOtherValues ? <Expression>[] : null;
 
     void checkType(int bit, DartType type) {
       if (expected.valueBits & bit == 0) {