Remove redundant field initialization in Java code.

chrome/android/java/src/org/chromium/chrome/browser/precache/PrecacheLauncher.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.Context;
 
 import org.chromium.base.Log;
 import org.chromium.base.ThreadUtils;
@@ skipping 19 matching lines @@
         return sInstance;
     }
 
     /** Pointer to the native PrecacheLauncher object. Set to 0 when uninitialized. */
     private long mNativePrecacheLauncher;
 
     /**
      * Initialized by updateEnabled to call updateEnabledSync when the sync backend is initialized.
      * Only accessed on the UI thread.
      */
-    private ProfileSyncService.SyncStateChangedListener mListener = null;
+    private ProfileSyncService.SyncStateChangedListener mListener;
 
     /**
      * Boolean failure indicators, reflecting the state of the last call to updatePrecachingEnabled.
      * Access must occur on the UI thread. Values default to false -- so if mCalled is false, the
      * value of the other booleans is not necessarily valid.
      */
-    private boolean mCalled = false;
-    private boolean mSyncInitialized = false;
-    private boolean mNetworkPredictionsAllowed = false;
-    private boolean mShouldRun = false;
+    private boolean mCalled;
+    private boolean mSyncInitialized;
+    private boolean mNetworkPredictionsAllowed;
+    private boolean mShouldRun;
 
     /** Destroy the native PrecacheLauncher, releasing the memory that it was using. */
     public void destroy() {
         if (mNativePrecacheLauncher != 0) {
             nativeDestroy(mNativePrecacheLauncher);
             mNativePrecacheLauncher = 0;
         }
     }
 
     /** Starts a precache cycle. */
@@ skipping 127 matching lines @@
         return reasons;
     }
 
     private native long nativeInit();
     private native void nativeDestroy(long nativePrecacheLauncher);
     private native void nativeStart(long nativePrecacheLauncher);
     private native void nativeCancel(long nativePrecacheLauncher);
 
     @VisibleForTesting native boolean nativeShouldRun();
 }