In CreateFolder, delete code to recursively create parent directories.

webrtc/rtc_base/fileutils.h

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 65 matching lines @@
 
 class FilesystemInterface {
  public:
   virtual ~FilesystemInterface() {}
 
   // This will attempt to delete the path located at filename.
   // It DCHECKs and returns false if the path points to a folder or a
   // non-existent file.
   virtual bool DeleteFile(const Pathname &filename) = 0;
 
-  // Creates a directory. This will call itself recursively to create /foo/bar
-  // even if /foo does not exist. Returns true if the function succeeds.
+  // Creates a directory. Parent directory must already exist. Returns
+  // true if the function succeeds.
   virtual bool CreateFolder(const Pathname &pathname) = 0;
 
   // This moves a file from old_path to new_path, where "old_path" is a
   // plain file. This DCHECKs and returns false if old_path points to a
   // directory, and returns true if the function succeeds.
   virtual bool MoveFile(const Pathname &old_path, const Pathname &new_path) = 0;
 
   // Returns true if pathname refers to a directory
   virtual bool IsFolder(const Pathname& pathname) = 0;
 
@@ skipping 65 matching lines @@
  private:
   static FilesystemInterface* default_filesystem_;
 
   static FilesystemInterface *EnsureDefaultFilesystem();
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(Filesystem);
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_RTC_BASE_FILEUTILS_H_