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

src/scopes.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_SCOPES_H_
 #define V8_SCOPES_H_
 
 #include "src/ast.h"
 #include "src/pending-compilation-error-handler.h"
 #include "src/zone.h"
@@ skipping 391 matching lines @@
     if (rest_index_ >= 0) return false;
     return true;
   }
 
   // The local variable 'arguments' if we need to allocate it; NULL otherwise.
   Variable* arguments() const {
     DCHECK(!is_arrow_scope() || arguments_ == nullptr);
     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_; }
 
   // Inner scope list.
   ZoneList<Scope*>* inner_scopes() { return &inner_scopes_; }
 
   // The scope immediately surrounding this scope, or NULL.
   Scope* outer_scope() const { return outer_scope_; }
 
   // The ModuleDescriptor for this scope; only for module scopes.
@@ skipping 137 matching lines @@
   // Declarations.
   ZoneList<Declaration*> decls_;
   // Convenience variable.
   Variable* receiver_;
   // Function variable, if any; function scopes only.
   VariableDeclaration* function_;
   // new.target variable, function scopes only.
   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_;
 
   // Illegal redeclaration.
   Expression* illegal_redecl_;
 
   // Scope-specific information computed during parsing.
   //
   // This scope is inside a 'with' of some outer scope.
   bool scope_inside_with_;
@@ skipping 173 matching lines @@
   PendingCompilationErrorHandler pending_error_handler_;
 
   // For tracking which classes are declared consecutively. Needed for strong
   // mode.
   int class_declaration_group_start_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCOPES_H_