Make URLFetcherFileWriter::Finish() skip closing file when there is an error

google_apis/drive/base_requests.h

 // Copyright (c) 2012 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.
 //
 // This file provides base classes used to issue HTTP requests for Google
 // APIs.
 
 #ifndef GOOGLE_APIS_DRIVE_BASE_REQUESTS_H_
 #define GOOGLE_APIS_DRIVE_BASE_REQUESTS_H_
 
@@ skipping 117 matching lines @@
   const std::string& data() const { return data_; }
 
   // Disowns the output file.
   void DisownFile();
 
   // URLFetcherResponseWriter overrides:
   int Initialize(const net::CompletionCallback& callback) override;
   int Write(net::IOBuffer* buffer,
             int num_bytes,
             const net::CompletionCallback& callback) override;
-  int Finish(const net::CompletionCallback& callback) override;
+  int Finish(int net_error, const net::CompletionCallback& callback) override;
 
  private:
   void DidWrite(scoped_refptr<net::IOBuffer> buffer,
                 const net::CompletionCallback& callback,
                 int result);
 
   const GetContentCallback get_content_callback_;
   std::string data_;
   std::unique_ptr<net::URLFetcherFileWriter> file_writer_;
   base::WeakPtrFactory<ResponseWriter> weak_ptr_factory_;
@@ skipping 490 matching lines @@
   const ProgressCallback progress_callback_;
   const GURL download_url_;
   const base::FilePath output_file_path_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadFileRequestBase);
 };
 
 }  // namespace google_apis
 
 #endif  // GOOGLE_APIS_DRIVE_BASE_REQUESTS_H_