Remove unused code from FileUtilProxy.

base/files/file_util_proxy.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 BASE_FILES_FILE_UTIL_PROXY_H_
 #define BASE_FILES_FILE_UTIL_PROXY_H_
 
 #include "base/base_export.h"
 #include "base/callback_forward.h"
 #include "base/files/file.h"
 #include "base/files/file_path.h"
-#include "base/memory/ref_counted.h"
-#include "base/platform_file.h"
-
-namespace tracked_objects {
-class Location;
-};
 
 namespace base {
 
 class TaskRunner;
 class Time;
 
 // This class provides asynchronous access to common file routines.
 class BASE_EXPORT FileUtilProxy {
  public:
   // This callback is used by methods that report only an error code.  It is
   // valid to pass a null callback to any function that takes a StatusCallback,
   // in which case the operation will complete silently.
   typedef Callback<void(File::Error)> StatusCallback;
 
   typedef Callback<void(File::Error,
-                        PassPlatformFile,
-                        bool /* created */)> CreateOrOpenCallback;
-  typedef Callback<void(File::Error,
-                        PassPlatformFile,
-                        const FilePath&)> CreateTemporaryCallback;
-  typedef Callback<void(File::Error,
                         const File::Info&)> GetFileInfoCallback;
-  typedef Callback<void(File::Error,
-                        const char* /* data */,
-                        int /* bytes read */)> ReadCallback;
-  typedef Callback<void(File::Error,
-                        int /* bytes written */)> WriteCallback;
-
-  typedef Callback<File::Error(PlatformFile*, bool*)> CreateOrOpenTask;
-  typedef Callback<File::Error(PlatformFile)> CloseTask;
-  typedef Callback<File::Error(void)> FileTask;
-
-  // Creates or opens a file with the given flags. It is invalid to pass a null
-  // callback. If PLATFORM_FILE_CREATE is set in |file_flags| it always tries to
-  // create a new file at the given |file_path| and calls back with
-  // PLATFORM_FILE_ERROR_FILE_EXISTS if the |file_path| already exists.
-  //
-  // This returns false if task posting to |task_runner| has failed.
-  static bool CreateOrOpen(TaskRunner* task_runner,
-                           const FilePath& file_path,
-                           int file_flags,
-                           const CreateOrOpenCallback& callback);
-
-  // Creates a temporary file for writing. The path and an open file handle are
-  // returned. It is invalid to pass a null callback. The additional file flags
-  // will be added on top of the default file flags which are:
-  //   base::PLATFORM_FILE_CREATE_ALWAYS
-  //   base::PLATFORM_FILE_WRITE
-  //   base::PLATFORM_FILE_TEMPORARY.
-  // Set |additional_file_flags| to 0 for synchronous writes and set to
-  // base::PLATFORM_FILE_ASYNC to support asynchronous file operations.
-  //
-  // This returns false if task posting to |task_runner| has failed.
-  static bool CreateTemporary(
-      TaskRunner* task_runner,
-      int additional_file_flags,
-      const CreateTemporaryCallback& callback);
-
-  // Close the given file handle.
-  // This returns false if task posting to |task_runner| has failed.
-  static bool Close(TaskRunner* task_runner,
-                    PlatformFile,
-                    const StatusCallback& callback);
 
   // Retrieves the information about a file. It is invalid to pass a null
   // callback.
   // This returns false if task posting to |task_runner| has failed.
   static bool GetFileInfo(
       TaskRunner* task_runner,
       const FilePath& file_path,
       const GetFileInfoCallback& callback);
 
-  // Does the same as GetFileInfo but takes PlatformFile instead of FilePath.
-  // This returns false if task posting to |task_runner| has failed.
-  static bool GetFileInfoFromPlatformFile(
-      TaskRunner* task_runner,
-      PlatformFile file,
-      const GetFileInfoCallback& callback);
-
   // Deletes a file or a directory.
   // It is an error to delete a non-empty directory with recursive=false.
   // This returns false if task posting to |task_runner| has failed.
   static bool DeleteFile(TaskRunner* task_runner,
                          const FilePath& file_path,
                          bool recursive,
                          const StatusCallback& callback);
 
-  // Reads from a file. On success, the file pointer is moved to position
-  // |offset + bytes_to_read| in the file. The callback can be null.
-  //
-  // This returns false if |bytes_to_read| is less than zero, or
-  // if task posting to |task_runner| has failed.
-  static bool Read(
-      TaskRunner* task_runner,
-      PlatformFile file,
-      int64 offset,
-      int bytes_to_read,
-      const ReadCallback& callback);
-
-  // Writes to a file. If |offset| is greater than the length of the file,
-  // |false| is returned. On success, the file pointer is moved to position
-  // |offset + bytes_to_write| in the file. The callback can be null.
-  // |bytes_to_write| must be greater than zero.
-  //
-  // This returns false if |bytes_to_write| is less than or equal to zero,
-  // if |buffer| is NULL, or if task posting to |task_runner| has failed.
-  static bool Write(
-      TaskRunner* task_runner,
-      PlatformFile file,
-      int64 offset,
-      const char* buffer,
-      int bytes_to_write,
-      const WriteCallback& callback);
-
   // Touches a file. The callback can be null.
   // This returns false if task posting to |task_runner| has failed.
   static bool Touch(
-      TaskRunner* task_runner,
-      PlatformFile file,
-      const Time& last_access_time,
-      const Time& last_modified_time,
-      const StatusCallback& callback);
-
-  // Touches a file. The callback can be null.
-  // This returns false if task posting to |task_runner| has failed.
-  static bool Touch(
       TaskRunner* task_runner,
       const FilePath& file_path,
       const Time& last_access_time,
       const Time& last_modified_time,
       const StatusCallback& callback);
 
-  // Truncates a file to the given length. If |length| is greater than the
-  // current length of the file, the file will be extended with zeroes.
-  // The callback can be null.
-  // This returns false if task posting to |task_runner| has failed.
-  static bool Truncate(
-      TaskRunner* task_runner,
-      PlatformFile file,
-      int64 length,
-      const StatusCallback& callback);
-
-  // Truncates a file to the given length. If |length| is greater than the
-  // current length of the file, the file will be extended with zeroes.
-  // The callback can be null.
-  // This returns false if task posting to |task_runner| has failed.
-  static bool Truncate(
-      TaskRunner* task_runner,
-      const FilePath& path,
-      int64 length,
-      const StatusCallback& callback);
-
-  // Flushes a file. The callback can be null.
-  // This returns false if task posting to |task_runner| has failed.
-  static bool Flush(
-      TaskRunner* task_runner,
-      PlatformFile file,
-      const StatusCallback& callback);
-
-  // Relay helpers.
-  // They return false if posting a given task to |task_runner| has failed.
-  static bool RelayCreateOrOpen(
-      TaskRunner* task_runner,
-      const CreateOrOpenTask& open_task,
-      const CloseTask& close_task,
-      const CreateOrOpenCallback& callback);
-  static bool RelayClose(
-      TaskRunner* task_runner,
-      const CloseTask& close_task,
-      PlatformFile,
-      const StatusCallback& callback);
-
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(FileUtilProxy);
 };
 
 }  // namespace base
 
 #endif  // BASE_FILES_FILE_UTIL_PROXY_H_