AppendToFile implementation.

base/file_util.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 contains utility functions for dealing with the local
 // filesystem.
 
 #ifndef BASE_FILE_UTIL_H_
 #define BASE_FILE_UTIL_H_
 #pragma once
@@ skipping 360 matching lines @@
 // the number of read bytes, or -1 on error.
 BASE_EXPORT int ReadFile(const FilePath& filename, char* data, int size);
 
 // Writes the given buffer into the file, overwriting any data that was
 // previously there.  Returns the number of bytes written, or -1 on error.
 BASE_EXPORT int WriteFile(const FilePath& filename, const char* data, int size);
 #if defined(OS_POSIX)
 // Append the data to |fd|. Does not close |fd| when done.
 BASE_EXPORT int WriteFileDescriptor(const int fd, const char* data, int size);
 #endif
+// Append the given buffer into the file. Returns the number of bytes written,
+// or -1 on error.
+BASE_EXPORT int AppendToFile(const FilePath& filename,
+                             const char* data, int size);
 
 // Gets the current working directory for the process.
 BASE_EXPORT bool GetCurrentDirectory(FilePath* path);
 
 // Sets the current working directory for the process.
 BASE_EXPORT bool SetCurrentDirectory(const FilePath& path);
 
 // Attempts to find a number that can be appended to the |path| to make it
 // unique. If |path| does not exist, 0 is returned.  If it fails to find such
 // a number, -1 is returned. If |suffix| is not empty, also checks the
@@ skipping 238 matching lines @@
 };
 
 // Attempts determine the FileSystemType for |path|.
 // Returns false if |path| doesn't exist.
 BASE_EXPORT bool GetFileSystemType(const FilePath& path, FileSystemType* type);
 #endif
 
 }  // namespace file_util
 
 #endif  // BASE_FILE_UTIL_H_