1 files changed, 0 insertions, 199 deletions
diff --git a/base/android/java/src/org/chromium/base/SysUtils.java b/base/android/java/src/org/chromium/base/SysUtils.java
deleted file mode 100644
index d4eb30de5b..0000000000
--- a/base/android/java/src/org/chromium/base/SysUtils.java
+++ /dev/null
@@ -1,199 +0,0 @@
-// 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.annotation.TargetApi;
-import android.app.ActivityManager;
-import android.content.Context;
-import android.content.pm.PackageManager;
-import android.os.Build;
-import android.os.StrictMode;
-import android.util.Log;
-
-import org.chromium.base.annotations.CalledByNative;
-import org.chromium.base.annotations.JNINamespace;
-import org.chromium.base.metrics.CachedMetrics;
-
-import java.io.BufferedReader;
-import java.io.FileReader;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
-/**
- * Exposes system related information about the current device.
- */
-@JNINamespace("base::android")
-public class SysUtils {
-    // A device reporting strictly more total memory in megabytes cannot be considered 'low-end'.
-    private static final int ANDROID_LOW_MEMORY_DEVICE_THRESHOLD_MB = 512;
-    private static final int ANDROID_O_LOW_MEMORY_DEVICE_THRESHOLD_MB = 1024;
-
-    private static final String TAG = "SysUtils";
-
-    private static Boolean sLowEndDevice;
-    private static Integer sAmountOfPhysicalMemoryKB;
-
-    private static CachedMetrics.BooleanHistogramSample sLowEndMatches =
-            new CachedMetrics.BooleanHistogramSample("Android.SysUtilsLowEndMatches");
-
-    private SysUtils() { }
-
-    /**
-     * Return the amount of physical memory on this device in kilobytes.
-     * @return Amount of physical memory in kilobytes, or 0 if there was
-     *         an error trying to access the information.
-     */
-    private static int detectAmountOfPhysicalMemoryKB() {
-        // 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
-        // an explicit parameter here makes all call paths _much_ more
-        // complicated.
-
-        Pattern pattern = Pattern.compile("^MemTotal:\\s+([0-9]+) kB$");
-        // Synchronously reading files in /proc in the UI thread is safe.
-        StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
-        try {
-            FileReader fileReader = new FileReader("/proc/meminfo");
-            try {
-                BufferedReader reader = new BufferedReader(fileReader);
-                try {
-                    String line;
-                    for (;;) {
-                        line = reader.readLine();
-                        if (line == null) {
-                            Log.w(TAG, "/proc/meminfo lacks a MemTotal entry?");
-                            break;
-                        }
-                        Matcher m = pattern.matcher(line);
-                        if (!m.find()) continue;
-
-                        int totalMemoryKB = Integer.parseInt(m.group(1));
-                        // Sanity check.
-                        if (totalMemoryKB <= 1024) {
-                            Log.w(TAG, "Invalid /proc/meminfo total size in kB: " + m.group(1));
-                            break;
-                        }
-
-                        return totalMemoryKB;
-                    }
-
-                } finally {
-                    reader.close();
-                }
-            } finally {
-                fileReader.close();
-            }
-        } catch (Exception e) {
-            Log.w(TAG, "Cannot get total physical size from /proc/meminfo", e);
-        } finally {
-            StrictMode.setThreadPolicy(oldPolicy);
-        }
-
-        return 0;
-    }
-
-    /**
-     * @return Whether or not this device should be considered a low end device.
-     */
-    @CalledByNative
-    public static boolean isLowEndDevice() {
-        if (sLowEndDevice == null) {
-            sLowEndDevice = detectLowEndDevice();
-        }
-        return sLowEndDevice.booleanValue();
-    }
-
-    /**
-     * @return Whether or not this device should be considered a low end device.
-     */
-    public static int amountOfPhysicalMemoryKB() {
-        if (sAmountOfPhysicalMemoryKB == null) {
-            sAmountOfPhysicalMemoryKB = detectAmountOfPhysicalMemoryKB();
-        }
-        return sAmountOfPhysicalMemoryKB.intValue();
-    }
-
-    /**
-     * @return Whether or not the system has low available memory.
-     */
-    @CalledByNative
-    public static boolean isCurrentlyLowMemory() {
-        ActivityManager am =
-                (ActivityManager) ContextUtils.getApplicationContext().getSystemService(
-                        Context.ACTIVITY_SERVICE);
-        ActivityManager.MemoryInfo info = new ActivityManager.MemoryInfo();
-        am.getMemoryInfo(info);
-        return info.lowMemory;
-    }
-
-    /**
-     * Resets the cached value, if any.
-     */
-    @VisibleForTesting
-    public static void resetForTesting() {
-        sLowEndDevice = null;
-        sAmountOfPhysicalMemoryKB = null;
-    }
-
-    public static boolean hasCamera(final Context context) {
-        final PackageManager pm = context.getPackageManager();
-        // JellyBean support.
-        boolean hasCamera = pm.hasSystemFeature(PackageManager.FEATURE_CAMERA);
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
-            hasCamera |= pm.hasSystemFeature(PackageManager.FEATURE_CAMERA_ANY);
-        }
-        return hasCamera;
-    }
-
-    @TargetApi(Build.VERSION_CODES.KITKAT)
-    private static boolean detectLowEndDevice() {
-        assert CommandLine.isInitialized();
-        if (CommandLine.getInstance().hasSwitch(BaseSwitches.ENABLE_LOW_END_DEVICE_MODE)) {
-            return true;
-        }
-        if (CommandLine.getInstance().hasSwitch(BaseSwitches.DISABLE_LOW_END_DEVICE_MODE)) {
-            return false;
-        }
-
-        sAmountOfPhysicalMemoryKB = detectAmountOfPhysicalMemoryKB();
-        boolean isLowEnd = true;
-        if (sAmountOfPhysicalMemoryKB <= 0) {
-            isLowEnd = false;
-        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-            isLowEnd = sAmountOfPhysicalMemoryKB / 1024 <= ANDROID_O_LOW_MEMORY_DEVICE_THRESHOLD_MB;
-        } else {
-            isLowEnd = sAmountOfPhysicalMemoryKB / 1024 <= ANDROID_LOW_MEMORY_DEVICE_THRESHOLD_MB;
-        }
-
-        // For evaluation purposes check whether our computation agrees with Android API value.
-        Context appContext = ContextUtils.getApplicationContext();
-        boolean isLowRam = false;
-        if (appContext != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
-            isLowRam = ((ActivityManager) ContextUtils.getApplicationContext().getSystemService(
-                                Context.ACTIVITY_SERVICE))
-                               .isLowRamDevice();
-        }
-        sLowEndMatches.record(isLowEnd == isLowRam);
-
-        return isLowEnd;
-    }
-
-    /**
-     * Creates a new trace event to log the number of minor / major page faults, if tracing is
-     * enabled.
-     */
-    public static void logPageFaultCountToTracing() {
-        nativeLogPageFaultCountToTracing();
-    }
-
-    private static native void nativeLogPageFaultCountToTracing();
-}