Remove redundant field initialization in Java code.

chrome/android/java/src/org/chromium/chrome/browser/omnibox/OmniboxPrerender.java

 // Copyright 2013 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.omnibox;
 
 import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.chrome.browser.tab.Tab;
 
 /**
  * Java bridge to handle conditional prerendering using autocomplete results * as the user types
  * into the Omnibox.
  *
  * OmniboxPrerender takes keystrokes, autocomplete results and navigation actions then feeds
  * them to the (native) AutocompleteActionPredictor. The predictor uses this data to update its
  * database and returns predictions on what page, if any, to pre-render or pre-connect.
  *
  */
 public class OmniboxPrerender {
-    private long mNativeOmniboxPrerender = 0;
+    private long mNativeOmniboxPrerender;
 
     /**
      * Constructor for creating a OmniboxPrerender instanace.
      */
     public OmniboxPrerender() {
         mNativeOmniboxPrerender = nativeInit();
     }
 
     /**
      * Clears the transitional matches. This should be called when the user stops typing into
@@ skipping 35 matching lines @@
 
     private native long nativeInit();
     private native void nativeClear(long nativeOmniboxPrerender, Profile profile);
     private native void nativeInitializeForProfile(
             long nativeOmniboxPrerender,
             Profile profile);
     private native void nativePrerenderMaybe(long nativeOmniboxPrerender, String url,
             String currentUrl, long nativeAutocompleteResult, Profile profile,
             Tab tab);
 }