Revert of Add a LocationUtils class to give all Chromium Android code access to location helpers.

components/location/android/java/src/org/chromium/components/location/LocationUtils.java

-// Copyright 2016 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.components.location;
-
-import android.Manifest;
-import android.content.Context;
-import android.content.Intent;
-import android.content.pm.PackageManager;
-import android.os.Build;
-import android.os.Process;
-import android.provider.Settings;
-import android.text.TextUtils;
-
-import org.chromium.base.ThreadUtils;
-import org.chromium.base.VisibleForTesting;
-import org.chromium.base.annotations.SuppressFBWarnings;
-
-/**
- * Provides methods for querying Chrome's ability to use Android's location services.
- *
- * This class should be used only on the UI thread.
- */
-public class LocationUtils {
-    // Used to construct sInstance if that's null.
-    private static Factory sFactory;
-
-    private static LocationUtils sInstance;
-
-    protected LocationUtils() {}
-
-    /**
-     * Returns the singleton instance of LocationSettings, creating it if needed.
-     */
-    @SuppressFBWarnings("LI_LAZY_INIT_STATIC")
-    public static LocationUtils getInstance() {
-        ThreadUtils.assertOnUiThread();
-        if (sInstance == null) {
-            if (sFactory == null) {
-                sInstance = new LocationUtils();
-            } else {
-                sInstance = sFactory.create();
-            }
-        }
-        return sInstance;
-    }
-
-    private boolean hasPermission(Context context, String name) {
-        return context.checkPermission(name, Process.myPid(), Process.myUid())
-                == PackageManager.PERMISSION_GRANTED;
-    }
-
-    /**
-     * Returns true if Chromium has permission to access location.
-     *
-     * Check both hasAndroidLocationPermission() and isSystemLocationSettingEnabled() to determine
-     * if Chromium's location requests will return results.
-     */
-    public boolean hasAndroidLocationPermission(Context context) {
-        return hasPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION)
-                || hasPermission(context, Manifest.permission.ACCESS_FINE_LOCATION);
-    }
-
-    /**
-     * Returns whether location services are enabled system-wide, i.e. whether any application is
-     * able to access location.
-     */
-    public boolean isSystemLocationSettingEnabled(Context context) {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
-            return Settings.Secure.getInt(context.getContentResolver(),
-                           Settings.Secure.LOCATION_MODE, Settings.Secure.LOCATION_MODE_OFF)
-                    != Settings.Secure.LOCATION_MODE_OFF;
-        } else {
-            return !TextUtils.isEmpty(Settings.Secure.getString(
-                    context.getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED));
-        }
-    }
-
-    /**
-     * Returns an intent to launch Android Location Settings.
-     */
-    public Intent getSystemLocationSettingsIntent() {
-        Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
-        i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-        return i;
-    }
-
-    /**
-     * Instantiate this to explain how to create a LocationUtils instance in
-     * LocationUtils.getInstance().
-     */
-    public interface Factory { public LocationUtils create(); }
-
-    /**
-     * Call this to use a different subclass of LocationUtils throughout the program.
-     * This can be used by embedders in addition to tests.
-     */
-    @VisibleForTesting
-    public static void setFactory(Factory factory) {
-        sFactory = factory;
-        sInstance = null;
-    }
-}