Fix kernel/impact_test

pkg/compiler/lib/src/resolution/members.dart

Index: pkg/compiler/lib/src/resolution/members.dart
diff --git a/pkg/compiler/lib/src/resolution/members.dart b/pkg/compiler/lib/src/resolution/members.dart
index 16843b3333342605ace7f0962930985b4e6c28fb..27f164f94d1af5502eacaa862035eda40d8ce5bd 100644
--- a/pkg/compiler/lib/src/resolution/members.dart
+++ b/pkg/compiler/lib/src/resolution/members.dart
@@ -1310,6 +1310,8 @@ class ResolverVisitor extends MappingVisitor<ResolutionResult> {
     Node right = node.arguments.head;
     visitExpression(left);
     visitExpression(right);
+    registry.registerConstantLiteral(new NullConstantExpression());
+    registry.registerDynamicUse(new DynamicUse(Selectors.equals, null));
     registry.registerSendStructure(node, const IfNullStructure());
     return const NoneResult();
   }