Remove redundant field initialization in Java code.

chrome/android/java/src/org/chromium/chrome/browser/precache/PrecacheController.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.chrome.browser.precache;
 
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
@@ skipping 76 matching lines @@
      * The default task scheduler. Overridden for tests.
      */
     private static PrecacheTaskScheduler sTaskScheduler = new PrecacheTaskScheduler();
 
     /**
      * Listener for syncservice backend.
      */
     SyncServiceInitializedNotifier mSyncServiceNotifier;
 
     /** True if a precache session is in progress. Threadsafe. */
-    private boolean mIsPrecaching = false;
+    private boolean mIsPrecaching;
 
     /** Wakelock that is held while precaching is in progress. */
     private WakeLock mPrecachingWakeLock;
 
     private Context mAppContext;
     private Queue<Integer> mFailureReasonsToRecord = new ArrayDeque<Integer>();
     private DeviceState mDeviceState = DeviceState.getInstance();
 
     /** Receiver that will be notified when conditions become wrong for precaching. */
     private final BroadcastReceiver mDeviceStateReceiver = new BroadcastReceiver() {
@@ skipping 453 matching lines @@
 
     private void recordBatteryLevelAtEnd() {
         int delta_percentage = mDeviceState.getCurrentBatteryPercentage(mAppContext)
                 - mDeviceState.getSavedBatteryPercentage();
         if (delta_percentage >= 0) {
             RecordHistogram.recordPercentageHistogram(
                     "Precache.BatteryPercentageDiff.End", delta_percentage);
         }
     }
 }