Remove redundant field initialization in Java code.

media/base/android/java/src/org/chromium/media/MediaPlayerListener.java

 // Copyright 2012 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.media;
 
 import android.content.Context;
 import android.media.MediaPlayer;
 
 import org.chromium.base.annotations.CalledByNative;
@@ skipping 14 matching lines @@
     private static final int MEDIA_ERROR_DECODE = 1;
     private static final int MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK = 2;
     private static final int MEDIA_ERROR_INVALID_CODE = 3;
     private static final int MEDIA_ERROR_SERVER_DIED = 4;
 
     // These values are copied from android media player.
     public static final int MEDIA_ERROR_MALFORMED = -1007;
     public static final int MEDIA_ERROR_TIMED_OUT = -110;
 
     // Used to determine the class instance to dispatch the native call to.
-    private long mNativeMediaPlayerListener = 0;
+    private long mNativeMediaPlayerListener;
     private final Context mContext;
 
     private MediaPlayerListener(long nativeMediaPlayerListener, Context context) {
         mNativeMediaPlayerListener = nativeMediaPlayerListener;
         mContext = context;
     }
 
     @Override
     public boolean onError(MediaPlayer mp, int what, int extra) {
         int errorType;
@@ skipping 86 matching lines @@
             int percent);
 
     private native void nativeOnMediaPrepared(long nativeMediaPlayerListener);
 
     private native void nativeOnPlaybackComplete(long nativeMediaPlayerListener);
 
     private native void nativeOnSeekComplete(long nativeMediaPlayerListener);
 
     private native void nativeOnMediaInterrupted(long nativeMediaPlayerListener);
 }