Remove stl_util's deletion functions from storage/.

storage/browser/blob/blob_reader.h

 // Copyright 2015 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.
 
 #ifndef STORAGE_BROWSER_BLOB_BLOB_READER_H_
 #define STORAGE_BROWSER_BLOB_BLOB_READER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 196 matching lines @@
   int net_error_;
   bool item_list_populated_ = false;
   std::vector<uint64_t> item_length_list_;
 
   scoped_refptr<net::DrainableIOBuffer> read_buf_;
 
   bool total_size_calculated_ = false;
   uint64_t total_size_ = 0;
   uint64_t remaining_bytes_ = 0;
   size_t pending_get_file_info_count_ = 0;
-  std::map<size_t, FileStreamReader*> index_to_reader_;
+  std::map<size_t, std::unique_ptr<FileStreamReader>> index_to_reader_;
   size_t current_item_index_ = 0;
   uint64_t current_item_offset_ = 0;
 
   bool io_pending_ = false;
 
   net::CompletionCallback size_callback_;
   net::CompletionCallback read_callback_;
 
   base::WeakPtrFactory<BlobReader> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(BlobReader);
 };
 
 }  // namespace storage
 #endif  // STORAGE_BROWSER_BLOB_BLOB_READER_H_