Remove redundant field initialization in Java code.

chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarTablet.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.toolbar;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.annotation.SuppressLint;
@@ skipping 35 matching lines @@
     private TintedImageButton mBackButton;
     private TintedImageButton mForwardButton;
     private TintedImageButton mReloadButton;
     private TintedImageButton mBookmarkButton;
     private TintedImageButton mSaveOfflineButton;
     private ImageButton mAccessibilitySwitcherButton;
 
     private OnClickListener mBookmarkListener;
     private OnClickListener mTabSwitcherListener;
 
-    private boolean mIsInTabSwitcherMode = false;
+    private boolean mIsInTabSwitcherMode;
 
     private boolean mShowTabStack;
     private boolean mToolbarButtonsVisible;
     private TintedImageButton[] mToolbarButtons;
 
     private NavigationPopup mNavigationPopup;
 
     private TabSwitcherDrawable mTabSwitcherButtonDrawable;
     private TabSwitcherDrawable mTabSwitcherButtonDrawableLight;
 
@@ skipping 576 matching lines @@
                 }
 
                 mButtonVisibilityAnimators = null;
             }
         });
 
         return set;
     }
 
 }