[es6] Support super.property in eval and arrow functions

src/scopes.h

Index: src/scopes.h
diff --git a/src/scopes.h b/src/scopes.h
index f3c64f9eadf73c7c4f9c1671779c4f55926697f9..73d99fce3af695d980ab2912bfe9f723410beaa5 100644
--- a/src/scopes.h
+++ b/src/scopes.h
@@ -409,6 +409,17 @@ class Scope: public ZoneObject {
     return arguments_;
   }
 
+  // A local variable to the [[HomeObject]] used by methods if we need to
+  // allocate it; NULL otherwise.
+  Variable* home_object_var() const {
+    // TODO(arv): Cleanup
+    // DCHECK(IsConciseMethod(function_kind()) ||
+    //        IsAccessorFunction(function_kind()) ||
+    //        IsConstructor(function_kind()));
+    DCHECK(!is_arrow_scope() || home_object_ == nullptr);
+    return home_object_;
+  }
+
   // Declarations list.
   ZoneList<Declaration*>* declarations() { return &decls_; }
 
@@ -566,6 +577,8 @@ class Scope: public ZoneObject {
   Variable* new_target_;
   // Convenience variable; function scopes only.
   Variable* arguments_;
+  // Convenience variable; method scopes only.
+  Variable* home_object_;
   // Module descriptor; module scopes only.
   ModuleDescriptor* module_descriptor_;