Refactor visitSendSet for super compounds and assignment.

pkg/compiler/lib/src/warnings.dart

Index: pkg/compiler/lib/src/warnings.dart
diff --git a/pkg/compiler/lib/src/warnings.dart b/pkg/compiler/lib/src/warnings.dart
index 5e5d603ae0c52c55f0a45072cdef8dc18d902c46..354c3c9b793b6bb4a87f354464e926340e4f6812 100644
--- a/pkg/compiler/lib/src/warnings.dart
+++ b/pkg/compiler/lib/src/warnings.dart
@@ -82,6 +82,7 @@ enum MessageKind {
   AMBIGUOUS_LOCATION,
   AMBIGUOUS_REEXPORT,
   ASSERT_IS_GIVEN_NAMED_ARGUMENTS,
+  ASSIGNING_FINAL_FIELD_IN_SUPER,
   ASSIGNING_METHOD,
   ASSIGNING_METHOD_IN_SUPER,
   ASSIGNING_TYPE,
@@ -1763,6 +1764,11 @@ main() => new C();"""]),
         const MessageTemplate(MessageKind.CANNOT_RESOLVE_SETTER,
           "Cannot resolve setter."),
 
+      MessageKind.ASSIGNING_FINAL_FIELD_IN_SUPER:
+        const MessageTemplate(MessageKind.ASSIGNING_FINAL_FIELD_IN_SUPER,
+          "Cannot assign a value to final field '#{name}' "
+          "in superclass '#{superclassName}'."),
+
       MessageKind.ASSIGNING_METHOD:
         const MessageTemplate(MessageKind.ASSIGNING_METHOD,
           "Cannot assign a value to a method."),