Type check field initializers.

sdk/lib/_internal/compiler/implementation/resolution/members.dart

Index: sdk/lib/_internal/compiler/implementation/resolution/members.dart
diff --git a/sdk/lib/_internal/compiler/implementation/resolution/members.dart b/sdk/lib/_internal/compiler/implementation/resolution/members.dart
index 6e2eb36d246b2adf8e4d9c6e6bd92974ca001fea..4e14102857f77372ce7f1f6c3f27e96537197af7 100644
--- a/sdk/lib/_internal/compiler/implementation/resolution/members.dart
+++ b/sdk/lib/_internal/compiler/implementation/resolution/members.dart
@@ -422,6 +422,8 @@ class ResolverTask extends CompilerTask {
             MessageKind.TOP_LEVEL_VARIABLE_DECLARED_STATIC);
     }
     ResolverVisitor visitor = visitorFor(element);
+    visitor.useElement(tree, element);
+
     // TODO(johnniwinther): Avoid analyzing initializers if
     // [Compiler.analyzeSignaturesOnly] is set.
     initializerDo(tree, visitor.visit);