Remove redundant field initialization in Java code.

components/precache/android/java/src/org/chromium/components/precache/DeviceState.java

 // Copyright 2015 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.precache;
 
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.os.BatteryManager;
 
 import org.chromium.base.VisibleForTesting;
 
 /**
  * Utility class that provides information about the current state of the device.
  */
 public class DeviceState {
-    private static DeviceState sDeviceState = null;
+    private static DeviceState sDeviceState;
 
     // Saved battery level percentage.
-    private int mSavedBatteryPercentage = 0;
+    private int mSavedBatteryPercentage;
 
     /** Disallow Construction of DeviceState objects. Use {@link #getInstance()} instead to create
      * a singleton instance.
      */
     protected DeviceState() {}
 
     public static DeviceState getInstance() {
         if (sDeviceState == null) sDeviceState = new DeviceState();
         return sDeviceState;
     }
@@ skipping 65 matching lines @@
         NetworkInfoDelegate networkInfo =
                 mNetworkInfoDelegateFactory.getNetworkInfoDelegate(context);
         return (networkInfo.isValid()
                 && networkInfo.isAvailable()
                 && networkInfo.isConnected()
                 && !networkInfo.isRoaming()
                 && !networkInfo.isActiveNetworkMetered());
     }
 }