Remove redundant field initialization in Java code.

chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchTabHelper.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.contextualsearch;
 
 import android.app.Activity;
 import android.view.ContextMenu;
 
 import org.chromium.base.annotations.CalledByNative;
@@ skipping 22 matching lines @@
     /**
      * The current ContentViewCore for the Tab which this helper is monitoring.
      */
     private ContentViewCore mBaseContentViewCore;
 
     /**
      * The GestureListener used for handling events from the current ContentViewCore.
      */
     private GestureStateListener mGestureStateListener;
 
-    private long mNativeHelper = 0;
+    private long mNativeHelper;
 
     private final Tab mTab;
 
     /**
      * Creates a contextual search tab helper for the given tab.
      * @param tab The tab whose contextual search actions will be handled by this helper.
      */
     public static void createForTab(Tab tab) {
         new ContextualSearchTabHelper(tab);
     }
@@ skipping 204 matching lines @@
         if (manager != null) {
             boolean isEnabled = !PrefServiceBridge.getInstance().isContextualSearchDisabled()
                     && !PrefServiceBridge.getInstance().isContextualSearchUninitialized();
             manager.onContextualSearchPrefChanged(isEnabled);
         }
     }
 
     private native long nativeInit(Profile profile);
     private native void nativeDestroy(long nativeContextualSearchTabHelper);
 }