Remove stl_util's deletion functions from storage/.

storage/browser/blob/blob_reader.h

Index: storage/browser/blob/blob_reader.h
diff --git a/storage/browser/blob/blob_reader.h b/storage/browser/blob/blob_reader.h
index 0a5a4b44c82a41146abc031d67d4397e011be68c..5a58f8aa255abde4b90a1b439cd4af9c634bfcdb 100644
--- a/storage/browser/blob/blob_reader.h
+++ b/storage/browser/blob/blob_reader.h
@@ -214,7 +214,7 @@ class STORAGE_EXPORT BlobReader {
   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;