chromium/chrome/browser/ui/startup/launch_mode_recorder.h

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CHROME_BROWSER_UI_STARTUP_LAUNCH_MODE_RECORDER_H_
#define CHROME_BROWSER_UI_STARTUP_LAUNCH_MODE_RECORDER_H_

#include <optional>

#include "base/functional/callback_forward.h"

namespace base {
class CommandLine;
}

// These enums describe how Chrome was launched. They are determined from the
// command line switches and arguments, not from what Chrome does when launched.
// "Web App" is shorthand for Chrome launched with --app or --appid switches,
// "Chrome" is Chrome launched with neither of those switches.
// These values are persisted to logs. Entries should not be renumbered and
// numeric values should never be reused.
enum class LaunchMode { … };

// Computes and records the launch mode based on `command_line` and process
// state. The launch mode may be recorded asynchronously.
void ComputeAndRecordLaunchMode(const base::CommandLine& command_line);

// Computes the launch mode based on `command_line` and process state. Runs
// `result_callback` with the result either synchronously or asynchronously on
// the caller's sequence.
// This is exposed for testing.
void ComputeLaunchMode(
    const base::CommandLine& command_line,
    base::OnceCallback<void(std::optional<LaunchMode>)> result_callback);

// Returns the callback used to record launch modes. This is used by unit tests
// to verify its behavior.
base::OnceCallback<void(std::optional<LaunchMode>)>
GetRecordLaunchModeForTesting();

#endif  // CHROME_BROWSER_UI_STARTUP_LAUNCH_MODE_RECORDER_H_