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

base/android/java/src/org/chromium/base/SysUtils.java

 // 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.
 
 package org.chromium.base;
 
 import android.os.Build;
 import android.util.Log;
 
 import java.io.BufferedReader;
@@ skipping 19 matching lines @@
     private SysUtils() { }
 
     /**
      * Return the amount of physical memory on this device in kilobytes.
      * Note: the only reason this is public is for testability reason.
      * @return Amount of physical memory in kilobytes, or 0 if there was
      *         an error trying to access the information.
      *
      * Note that this is CalledByNative for testing purpose only.
      */
-    @CalledByNative
     public static int amountOfPhysicalMemoryKB() {
         // Extract total memory RAM size by parsing /proc/meminfo, note that
         // this is exactly what the implementation of sysconf(_SC_PHYS_PAGES)
         // does. However, it can't be called because this method must be
         // usable before any native code is loaded.
 
         // An alternative is to use ActivityManager.getMemoryInfo(), but this
         // requires a valid ActivityManager handle, which can only come from
         // a valid Context object, which itself cannot be retrieved
         // during early startup, where this method is called. And making it
@@ skipping 68 matching lines @@
         }
 
         if (Build.VERSION.SDK_INT <= ANDROID_LOW_MEMORY_ANDROID_SDK_THRESHOLD) {
             return false;
         }
 
         int ramSizeKB = amountOfPhysicalMemoryKB();
         return (ramSizeKB > 0 && ramSizeKB / 1024 < ANDROID_LOW_MEMORY_DEVICE_THRESHOLD_MB);
     }
 }