chrome/browser/data_saver/data_saver.h

// Copyright 2022 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_DATA_SAVER_DATA_SAVER_H_
#define CHROME_BROWSER_DATA_SAVER_DATA_SAVER_H_

#include "content/public/browser/browser_context.h"

namespace data_saver {

// Overrides the data saver setting when testing.
void OverrideIsDataSaverEnabledForTesting(bool flag);

// Resets the override flag.
void ResetIsDataSaverEnabledForTesting();

// Fetch and cache the Android Data Saver saver setting.
void FetchDataSaverOSSettingAsynchronously();

// Returns true if the Android Data Saver option is enabled. On non-Android
// OSes, this always return false. Note that the result returned by this
// function may be stale. Making OS calls to get the state of the Data Saver
// setting can be slow. For this reason, we make the OS calls happen in a
// background thread and store the result in a global variable. Calling
// IsDataSaverEnabled immediately returns the last cached value and fires of OS
// calls in a background thread. If there is no cached value, this function may
// lookup the setting synchronously, depending on the state of the
// DataSaverSettingBlockWhenUninitialized Finch feature.
bool IsDataSaverEnabled(content::BrowserContext* browser_context);

}  // namespace data_saver

#endif  // CHROME_BROWSER_DATA_SAVER_DATA_SAVER_H_