Revert 244982 "Revert 244857 "net: Remove classes which were use..."

net/base/upload_file_element_reader.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.
 
 #ifndef NET_BASE_UPLOAD_FILE_ELEMENT_READER_H_
 #define NET_BASE_UPLOAD_FILE_ELEMENT_READER_H_
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/gtest_prod_util.h"
@@ skipping 88 matching lines @@
   const uint64 range_length_;
   const base::Time expected_modification_time_;
   ScopedFileStreamPtr file_stream_;
   uint64 content_length_;
   uint64 bytes_remaining_;
   base::WeakPtrFactory<UploadFileElementReader> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UploadFileElementReader);
 };
 
-// An UploadElementReader implementation for file which performs file operation
-// synchronously.
-// Use this class only if the thread is IO allowed.
-class NET_EXPORT UploadFileElementReaderSync : public UploadElementReader {
- public:
-  UploadFileElementReaderSync(const base::FilePath& path,
-                              uint64 range_offset,
-                              uint64 range_length,
-                              const base::Time& expected_modification_time);
-  virtual ~UploadFileElementReaderSync();
-
-  // UploadElementReader overrides:
-  virtual int Init(const CompletionCallback& callback) OVERRIDE;
-  virtual uint64 GetContentLength() const OVERRIDE;
-  virtual uint64 BytesRemaining() const OVERRIDE;
-  virtual int Read(IOBuffer* buf,
-                   int buf_length,
-                   const CompletionCallback& callback) OVERRIDE;
-
- private:
-  const base::FilePath path_;
-  const uint64 range_offset_;
-  const uint64 range_length_;
-  const base::Time expected_modification_time_;
-  scoped_ptr<FileStream> file_stream_;
-  uint64 content_length_;
-  uint64 bytes_remaining_;
-
-  DISALLOW_COPY_AND_ASSIGN(UploadFileElementReaderSync);
-};
-
 }  // namespace net
 
 #endif  // NET_BASE_UPLOAD_FILE_ELEMENT_READER_H_