Update status for minified and fix a type warning

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

Index: dart/sdk/lib/_internal/compiler/implementation/resolution/members.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/resolution/members.dart b/dart/sdk/lib/_internal/compiler/implementation/resolution/members.dart
index 6b6d9d4569ddc47c31a514f208731df2bbe46012..c8901236e07895d9c8ca9fe031d207ec02619afe 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/resolution/members.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/resolution/members.dart
@@ -2592,7 +2592,9 @@ class ResolverVisitor extends CommonResolverVisitor<Element> {
         compiler.reportErrorCode(argumentNode, MessageKind.STRING_EXPECTED,
                                  {'type': type});
       } else {
-        validateSymbol(argumentNode, name.toDartString().slowToString());
+        StringConstant stringConstant = name;
+        validateSymbol(argumentNode,
+                       stringConstant.toDartString().slowToString());
       }
     }