base::CopyFile can copy *from* Android's content scheme.

base/files/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_FILES_FILE_UTIL_H_
 #define BASE_FILES_FILE_UTIL_H_
 
@@ skipping 403 matching lines @@
 
 // Internal --------------------------------------------------------------------
 
 namespace internal {
 
 // Same as Move but allows paths with traversal components.
 // Use only with extreme care.
 BASE_EXPORT bool MoveUnsafe(const FilePath& from_path,
                             const FilePath& to_path);
 
-// Same as CopyFile but allows paths with traversal components.
-// Use only with extreme care.
-BASE_EXPORT bool CopyFileUnsafe(const FilePath& from_path,
-                                const FilePath& to_path);
-
 #if defined(OS_WIN)
 // Copy from_path to to_path recursively and then delete from_path recursively.
 // Returns true if all operations succeed.
 // This function simulates Move(), but unlike Move() it works across volumes.
 // This function is not transactional.
 BASE_EXPORT bool CopyAndDeleteDirectory(const FilePath& from_path,
                                         const FilePath& to_path);
 #endif  // defined(OS_WIN)
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_FILES_FILE_UTIL_H_