Revert of Refactorise the policy_path_parser framework

chrome/browser/policy/policy_path_parser.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/policy/policy_path_parser.h"
-
-#include "base/bind.h"
-#include "base/files/file_path.h"
-
-namespace {
-
-void TrimQuotes(base::FilePath::StringType* path) {
-  if (path->length() > 1 &&
-      (((*path)[0] == FILE_PATH_LITERAL('"') &&
-        (*path)[path->length() - 1] == FILE_PATH_LITERAL('"')) ||
-       ((*path)[0] == FILE_PATH_LITERAL('\'') &&
-        (*path)[path->length() - 1] == FILE_PATH_LITERAL('\'')))) {
-    // Strip first and last char which should be matching quotes now.
-    *path = path->substr(1, path->length() - 2);
-  }
-}
-
-}  // namespace
-
-namespace policy {
-
-namespace path_parser {
-
-// This function performs a lazy call to the GetValueCallback, that is the
-// callback is invoked only if the variable is found in the path. This is done
-// to reduce the overhead during initialization.
-void ReplaceVariableInPathWithValue(
-    const base::FilePath::StringType& variable,
-    const policy::path_parser::internal::GetValueFuncPtr& value_func_ptr,
-    base::FilePath::StringType* path) {
-  size_t position = path->find(variable);
-  base::FilePath::StringType value;
-  if (position != base::FilePath::StringType::npos && value_func_ptr(&value))
-    path->replace(position, variable.length(), value);
-}
-
-// Replaces all variable occurrences in the policy string with the respective
-// system settings values.
-base::FilePath::StringType ExpandPathVariables(
-    const base::FilePath::StringType& untranslated_string) {
-  base::FilePath::StringType result(untranslated_string);
-
-  if (result.length() == 0)
-    return result;
-
-  // Sanitize quotes in case of any around the whole string.
-  TrimQuotes(&result);
-
-  base::FilePath::StringType variable;
-  internal::GetValueFuncPtr val_func_ptr;
-  for (int i = 0; i < internal::kNoOfVariables; ++i) {
-    variable = internal::kVariableNameAndValueCallbacks[i].name;
-    val_func_ptr = internal::kVariableNameAndValueCallbacks[i].value_func_ptr;
-    ReplaceVariableInPathWithValue(variable, val_func_ptr, &result);
-  }
-
-  return result;
-}
-
-}  // namespace path_parser
-
-}  // namespace policy