Remove a few unused typedefs.

chrome/browser/media_galleries/fileapi/iphoto_data_provider.cc

 // Copyright 2013 The Chromium 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 "chrome/browser/media_galleries/fileapi/iphoto_data_provider.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 30 matching lines @@
                                          const parser::Library& library) {
   DCHECK(MediaFileSystemBackend::CurrentlyOnMediaTaskRunnerThread());
   set_valid(result);
   if (valid())
     BuildIndices(library);
   ready_callback.Run(valid());
 }
 
 void IPhotoDataProvider::BuildIndices(const parser::Library& library) {
   typedef base::hash_map<uint64, const base::FilePath*> IdIndex;
-  typedef base::hash_map<uint64, std::string> IdFileNameIndex;
 
   IdIndex photo_id_index;
   IdIndex originals_id_index;
   for (std::set<parser::Photo>::const_iterator photo_it =
            library.all_photos.begin();
        photo_it != library.all_photos.end(); photo_it++) {
     photo_id_index[photo_it->id] = &(photo_it->location);
     if (!photo_it->original_location.empty())
       originals_id_index[photo_it->id] = &(photo_it->original_location);
   }
@@ skipping 116 matching lines @@
   DirIndex::const_iterator originals_it = originals_index_.find(album);
   if (originals_it == originals_index_.end())
     return base::FilePath();
   FileIndex::const_iterator file_it = originals_it->second.find(filename);
   if (file_it == originals_it->second.end())
     return base::FilePath();
   return file_it->second;
 }
 
 }  // namespace iphoto