Remove redundant field initialization in Java code.

chrome/android/java/src/org/chromium/chrome/browser/omnibox/LocationBarLayout.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.omnibox;
 
 import static org.chromium.chrome.browser.toolbar.ToolbarPhone.URL_FOCUS_CHANGE_ANIMATION_DURATION_MS;
 
 import android.Manifest;
 import android.animation.Animator;
@@ skipping 133 matching lines @@
             "about", "data", "file", "ftp", "http", "https", "inline", "javascript", "chrome");
     private static final HashSet<String> UNSUPPORTED_SCHEMES_TO_SPLIT =
             CollectionUtil.newHashSet("file", "javascript", "data");
 
     protected ImageView mNavigationButton;
     protected TintedImageButton mSecurityButton;
     protected TextView mVerboseStatusTextView;
     protected TintedImageButton mDeleteButton;
     protected TintedImageButton mMicButton;
     protected UrlBar mUrlBar;
-    private ActionModeController mActionModeController = null;
+    private ActionModeController mActionModeController;
 
     private AutocompleteController mAutocomplete;
 
     protected ToolbarDataProvider mToolbarDataProvider;
     private UrlFocusChangeListener mUrlFocusChangeListener;
 
     protected boolean mNativeInitialized;
 
     private final List<Runnable> mDeferredNativeRunnables = new ArrayList<Runnable>();
 
@@ skipping 2341 matching lines @@
     public View getContainerView() {
         return this;
     }
 
     @Override
     public void setTitleToPageTitle() { }
 
     @Override
     public void setShowTitle(boolean showTitle) { }
 }