Expose a low-end device mode override flags for non-android OSs as well

base/android/sys_utils.h

-// Copyright 2013 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.
-
-#ifndef BASE_ANDROID_SYS_UTILS_H_
-#define BASE_ANDROID_SYS_UTILS_H_
-
-#include "base/android/jni_android.h"
-
-namespace base {
-namespace android {
-
-class BASE_EXPORT SysUtils {
- public:
-  static bool Register(JNIEnv* env);
-
-  // Returns true iff this is a low-end device.
-  static bool IsLowEndDevice();
-
-  // Return the device's RAM size in kilo-bytes. Used for testing.
-  static size_t AmountOfPhysicalMemoryKB();
-
- private:
-  SysUtils();
-
-  static bool IsLowEndDeviceFromJni();
-  static size_t AmountOfPhysicalMemoryKBFromJni();
-};
-
-}  // namespace android
-}  // namespace base
-
-#endif  // BASE_ANDROID_SYS_UTILS_H_