[fsp] Remove the exclusive field from the CreateDirectory operation.

chrome/browser/chromeos/file_system_provider/provided_file_system_interface.h

 // Copyright 2014 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 CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_INTERFACE_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_INTERFACE_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 88 matching lines @@
   // can be called multiple times until |has_more| is set to false. On success
   // it should return |length| bytes starting from |offset| in total. It can
   // return less only in case EOF is encountered.
   virtual AbortCallback ReadFile(int file_handle,
                                  net::IOBuffer* buffer,
                                  int64 offset,
                                  int length,
                                  const ReadChunkReceivedCallback& callback) = 0;
 
   // Requests creating a directory. If |recursive| is passed, then all non
-  // existing directories on the path will be created. If |exclusive| is true,
-  // then creating the directory will fail, if it already exists.
+  // existing directories on the path will be created. The operation will fail
+  // if the target directory already exists.
   virtual AbortCallback CreateDirectory(
       const base::FilePath& directory_path,
-      bool exclusive,
       bool recursive,
       const storage::AsyncFileUtil::StatusCallback& callback) = 0;
 
   // Requests creating a file. If the entry already exists, then the
   // FILE_ERROR_EXISTS error must be returned.
   virtual AbortCallback CreateFile(
       const base::FilePath& file_path,
       const storage::AsyncFileUtil::StatusCallback& callback) = 0;
 
   // Requests deleting a directory. If |recursive| is passed and the entry is
@@ skipping 38 matching lines @@
   virtual RequestManager* GetRequestManager() = 0;
 
   // Returns a weak pointer to this object.
   virtual base::WeakPtr<ProvidedFileSystemInterface> GetWeakPtr() = 0;
 };
 
 }  // namespace file_system_provider
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PROVIDED_FILE_SYSTEM_INTERFACE_H_