Copy and paste error from CL 2647043002.

pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart

Index: pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
diff --git a/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart b/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
index 715b66ab57f99d332ed5e3176d341810c34f4ab1..8ce793da7245b04d2175342914f218643259237c 100644
--- a/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
+++ b/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
@@ -955,7 +955,7 @@ class Constantifier extends ir.ExpressionVisitor<ConstantExpression> {
   ConstantExpression visitStaticGet(ir.StaticGet node) {
     Element element = astAdapter.getMember(node.target);
     if (element.isField) {
-      return new VariableConstantExpression(element as MemberElement);
+      return new VariableConstantExpression(element as VariableElement);
     }
     astAdapter.reporter.internalError(
         CURRENT_ELEMENT_SPANNABLE, "Unexpected constant target: $element.");