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

src/objects.h

 // Copyright 2015 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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 4556 matching lines @@
     kImportNameIndex,
     kModuleRequestIndex,
     kLength
   };
 };
 
 // ModuleInfo is to ModuleDescriptor what ScopeInfo is to Scope.
 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;
   inline FixedArray* special_imports() const;
   inline FixedArray* regular_imports() const;
 
 #ifdef DEBUG
   inline bool Equals(ModuleInfo* other) const;
 #endif
 
@@ skipping 3341 matching lines @@
   // ModuleInfo::module_requests.
   DECL_ACCESSORS(requested_modules, FixedArray)
 
   // [[Evaluated]]: Whether this module has been evaluated. Modules
   // are only evaluated a single time.
   DECL_BOOLEAN_ACCESSORS(evaluated)
 
   // 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);
 
   static const int kCodeOffset = HeapObject::kHeaderSize;
   static const int kExportsOffset = kCodeOffset + kPointerSize;
   static const int kRequestedModulesOffset = kExportsOffset + kPointerSize;
   static const int kFlagsOffset = kRequestedModulesOffset + kPointerSize;
   static const int kSize = kFlagsOffset + kPointerSize;
 
@@ skipping 3417 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_