Add a Share Icon to Tabular Context Menu

chrome/android/java/res/layout/tabular_context_menu_row.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2017 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. -->
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:orientation="horizontal"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:paddingStart="15dp"
     android:paddingEnd="15dp"
     android:minHeight="40dp"
     tools:ignore="UseCompoundDrawables">
     <ImageView
         android:id="@+id/context_menu_icon"
         android:layout_width="20dp"
         android:layout_height="20dp"
         android:layout_gravity="center_vertical"
         android:contentDescription="@null" />
     <TextView
         android:id="@+id/context_text"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_gravity="center_vertical"
         android:layout_marginStart="10dp"
         android:layout_weight="1"
         android:textSize="15sp"
         android:textColor="#dd000000" />
+    <ImageView
+        android:id="@+id/context_menu_share_icon"
+        android:layout_width="20dp"
+        android:layout_height="20dp"
+        android:layout_gravity="center_vertical"
+        android:contentDescription="@null"
+        android:visibility="gone"/>
 </LinearLayout>