blob: db0871e7a6e08fe53c826acb61523aa029958813 [file] [log] [blame]
// Copyright 2016 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 "base/files/file_path.h"
#include "base/macros.h"
namespace installer {
// When a PersistentHistogramStorage is destructed, histograms recorded during
// its lifetime are persisted in the directory set by set_storage_dir().
// Histograms are not persisted if set_storage_dir() has not been called or if
// the storage directory does not exist on destruction.
// PersistentHistogramStorage should be instantiated as early as possible in the
// process lifetime and should never be instantiated again. Persisted histograms
// will eventually be reported by the browser process.
class PersistentHistogramStorage {
// Sets |storage_dir| as the directory in which histograms will be persisted
// when this PersistentHistogramStorage is destructed.
void set_storage_dir(const base::FilePath& storage_dir) {
storage_dir_ = storage_dir;
// Returns a directory in which setup histograms must be persisted to be
// reported by a product installed in |target_path|. Should be used as
// argument to set_storage_dir().
static base::FilePath GetReportedStorageDir(
const base::FilePath& target_path);
base::FilePath storage_dir_;
} // namespace installer