Allow lookup of module exports by export name.

src/modules.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_MODULES_H_
 #define V8_MODULES_H_
 
 #include "src/zone.h"
 
 namespace v8 {
@@ skipping 40 matching lines @@
     ZoneHashMap* exports = exports_;
     return exports ? exports->occupancy() : 0;
   }
 
   // The context slot in the hosting script context pointing to this module.
   int Index() {
     DCHECK(IsFrozen());
     return index_;
   }
 
+  const AstRawString* LookupLocalExport(const AstRawString* export_name,
+                                        Zone* zone);
+
   // ---------------------------------------------------------------------------
   // Iterators.
 
   // Use like:
   //   for (auto it = descriptor->iterator(); !it.done(); it.Advance()) {
   //     ... it.name() ...
   //   }
   class Iterator {
    public:
     bool done() const { return entry_ == NULL; }
@@ skipping 24 matching lines @@
   bool frozen_;
   ZoneHashMap* exports_;   // Module exports and their types (allocated lazily)
   int index_;
 
   ModuleDescriptor() : frozen_(false), exports_(NULL), index_(-1) {}
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_MODULES_H_