Propagate types of static const variables.

pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
index c960bcb78905a36fc561905e87d65dbd11b20811..829f94247f275b8b74420fbd4198d44d03a7f38b 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
@@ -3353,6 +3353,7 @@ class JsIrBuilderVisitor extends IrBuilderVisitor {
   ir.Primitive buildStaticFieldGet(FieldElement field, SourceInformation src) {
     ConstantValue constant = getConstantForVariable(field);
     if (constant != null && !field.isAssignable) {
+      typeMaskSystem.associateConstantValueWithElement(constant, field);
       return irBuilder.buildConstant(constant, sourceInformation: src);
     } else if (backend.constants.lazyStatics.contains(field)) {
       return irBuilder.buildStaticFieldLazyGet(field, src);