Implement super.foo = expression.

dart/lib/compiler/implementation/ssa/codegen.dart

Index: dart/lib/compiler/implementation/ssa/codegen.dart
diff --git a/dart/lib/compiler/implementation/ssa/codegen.dart b/dart/lib/compiler/implementation/ssa/codegen.dart
index 70014cfcd8bfc91f94cb528b58f17d69770a2186..6f87ea455a5999f76a1fa208714540b72bda284e 100644
--- a/dart/lib/compiler/implementation/ssa/codegen.dart
+++ b/dart/lib/compiler/implementation/ssa/codegen.dart
@@ -1499,7 +1499,14 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
         SourceString name = superMethod.name;
         fieldName = compiler.namer.instanceFieldName(library, name);
       }
-      push(new js.PropertyAccess.field(new js.This(), fieldName), node);
+      js.PropertyAccess access =
+          new js.PropertyAccess.field(new js.This(), fieldName);
+      if (node.isSetter) {
+        use(node.value);
+        push(new js.Assignment(access, pop()), node);
+      } else {
+        push(access, node);
+      }
     } else {
       String methodName;
       if (superMethod.kind == ElementKind.FUNCTION ||