Remove redundant field initialization in Java code.

chrome/android/java/src/org/chromium/chrome/browser/media/ui/MediaNotificationInfo.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.media.ui;
 
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.text.TextUtils;
 
@@ skipping 28 matching lines @@
     /**
      * The invalid notification id.
      */
     public static final int INVALID_ID = -1;
 
     /**
      * Use this class to construct an instance of {@link MediaNotificationInfo}.
      */
     public static final class Builder {
 
-        private MediaMetadata mMetadata = null;
-        private boolean mIsPaused = false;
+        private MediaMetadata mMetadata;
+        private boolean mIsPaused;
         private String mOrigin = "";
         private int mTabId = Tab.INVALID_TAB_ID;
         private boolean mIsPrivate = true;
-        private int mIcon = 0;
-        private Bitmap mLargeIcon = null;
-        private int mDefaultLargeIcon = 0;
+        private int mIcon;
+        private Bitmap mLargeIcon;
+        private int mDefaultLargeIcon;
         private int mActions = ACTION_PLAY_PAUSE | ACTION_SWIPEAWAY;
         private int mId = INVALID_ID;
-        private Intent mContentIntent = null;
-        private MediaNotificationListener mListener = null;
-        private Set<Integer> mMediaSessionActions = null;
+        private Intent mContentIntent;
+        private MediaNotificationListener mListener;
+        private Set<Integer> mMediaSessionActions;
 
         /**
          * Initializes the builder with the default values.
          */
         public Builder() {
         }
 
         public MediaNotificationInfo build() {
             assert mMetadata != null;
             assert mOrigin != null;
@@ skipping 233 matching lines @@
         result = 31 * result + icon;
         result = 31 * result + (largeIcon == null ? 0 : largeIcon.hashCode());
         result = 31 * result + defaultLargeIcon;
         result = 31 * result + mActions;
         result = 31 * result + id;
         result = 31 * result + listener.hashCode();
         result = 31 * result + mediaSessionActions.hashCode();
         return result;
     }
 }