[modules] Support exporting a local variable under multiple export names.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 9486a34e44c296f5327303e5454bd75872467970..34dcebd0d50ff958f24f00a566a852822ea09759 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -4574,7 +4574,8 @@ class ModuleInfoEntry : public FixedArray {
 class ModuleInfo : public FixedArray {
  public:
   DECLARE_CAST(ModuleInfo)
-  static Handle<ModuleInfo> New(Isolate* isolate, ModuleDescriptor* descr);
+  static Handle<ModuleInfo> New(Isolate* isolate, Zone* zone,
+                                ModuleDescriptor* descr);
   inline FixedArray* module_requests() const;
   inline FixedArray* special_exports() const;
   inline FixedArray* regular_exports() const;
@@ -7936,7 +7937,7 @@ class Module : public Struct {
   // Storage for [[Evaluated]]
   DECL_INT_ACCESSORS(flags)
 
-  static void CreateExport(Handle<Module> module, Handle<String> name);
+  static void CreateExport(Handle<Module> module, Handle<FixedArray> names);
   static void StoreExport(Handle<Module> module, Handle<String> name,
                           Handle<Object> value);
   static Handle<Object> LoadExport(Handle<Module> module, Handle<String> name);