[modules] Simplify treatment of empty imports.

src/ast/modules.cc

 // 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.
 
 #include "src/ast/modules.h"
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/scopes.h"
 
 namespace v8 {
 namespace internal {
 
 void ModuleDescriptor::AddImport(
     const AstRawString* import_name, const AstRawString* local_name,
     const AstRawString* module_request, Scanner::Location loc, Zone* zone) {
   Entry* entry = new (zone) Entry(loc);
   entry->local_name = local_name;
   entry->import_name = import_name;
   entry->module_request = AddModuleRequest(module_request);
   AddRegularImport(entry);
 }
 
 
 void ModuleDescriptor::AddStarImport(
     const AstRawString* local_name, const AstRawString* module_request,
     Scanner::Location loc, Zone* zone) {
-  DCHECK_NOT_NULL(local_name);
   Entry* entry = new (zone) Entry(loc);
   entry->local_name = local_name;
   entry->module_request = AddModuleRequest(module_request);
-  AddSpecialImport(entry, zone);
+  AddNamespaceImport(entry, zone);
+}
+
+void ModuleDescriptor::AddEmptyImport(const AstRawString* module_request) {
+  AddModuleRequest(module_request);
 }
 
 
-void ModuleDescriptor::AddEmptyImport(
-    const AstRawString* module_request, Scanner::Location loc, Zone* zone) {
-  Entry* entry = new (zone) Entry(loc);
-  entry->module_request = AddModuleRequest(module_request);
-  AddSpecialImport(entry, zone);
-}
-
-
 void ModuleDescriptor::AddExport(
     const AstRawString* local_name, const AstRawString* export_name,
     Scanner::Location loc, Zone* zone) {
   Entry* entry = new (zone) Entry(loc);
   entry->export_name = export_name;
   entry->local_name = local_name;
   AddRegularExport(entry);
 }
 
 
@@ skipping 210 matching lines @@
       return false;
     }
   }
 
   MakeIndirectExportsExplicit(zone);
   return true;
 }
 
 }  // namespace internal
 }  // namespace v8