Remove redundant field initialization in Java code.

net/android/java/src/org/chromium/net/HttpNegotiateAuthenticator.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.net;
 
 import android.Manifest;
 import android.accounts.Account;
 import android.accounts.AccountManager;
 import android.accounts.AccountManagerCallback;
@@ skipping 41 matching lines @@
  *  - ERR_MISCONFIGURED_AUTH_ENVIRONMENT: The authentication can't be completed because of some
  *    issues in the configuration of the app. Some permissions may be missing.
  *
  * Please search for the "cr_net_auth" tag in logcat to have more information about the cause of
  * these errors.
  * ================================================================================================
  */
 @JNINamespace("net::android")
 public class HttpNegotiateAuthenticator {
     private static final String TAG = "net_auth";
-    private Bundle mSpnegoContext = null;
+    private Bundle mSpnegoContext;
     private final String mAccountType;
 
     /**
      * Structure designed to hold the data related to a specific request across the various
      * callbacks needed to complete it.
      */
     static class RequestData {
         /** Native object to post the result to. */
         public long nativeResultObject;
 
@@ skipping 295 matching lines @@
 
         int permissionResult =
                 context.checkPermission(permission, Process.myPid(), Process.myUid());
         return permissionResult != PackageManager.PERMISSION_GRANTED;
     }
 
     @VisibleForTesting
     native void nativeSetResult(
             long nativeJavaNegotiateResultWrapper, int status, String authToken);
 }