[fsp] Rename file_system_name to display_name for consistency.

chrome/browser/chromeos/file_system_provider/provided_file_system_info.cc

 // 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.
 
 #include "chrome/browser/chromeos/file_system_provider/provided_file_system_info.h"
 
 namespace chromeos {
 namespace file_system_provider {
 
 ProvidedFileSystemInfo::ProvidedFileSystemInfo() {}
 
 ProvidedFileSystemInfo::ProvidedFileSystemInfo(
     const std::string& extension_id,
     const std::string& file_system_id,
-    const std::string& file_system_name,
+    const std::string& display_name,
     const base::FilePath& mount_path)
     : extension_id_(extension_id),
       file_system_id_(file_system_id),
-      file_system_name_(file_system_name),
+      display_name_(display_name),
       mount_path_(mount_path) {
 }
 
 ProvidedFileSystemInfo::~ProvidedFileSystemInfo() {}
 
 }  // namespace file_system_provider
 }  // namespace chromeos