[Downloads] Fix toolbar buttons' content descriptions

chrome/android/java/res/menu/download_manager_menu.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2016 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. -->
 
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:chrome="http://schemas.android.com/apk/res-auto" >
 
     <group android:id="@+id/normal_menu_group" >
         <item
             android:id="@+id/close_menu_id"
             android:icon="@drawable/btn_close"
             android:title="@string/close"
             chrome:showAsAction="ifRoom" />
      </group>
      <group
         android:id="@+id/selection_mode_menu_group"
         android:visible="false" >
         <item
             android:id="@+id/selection_mode_share_menu_id"
             android:icon="@drawable/ic_share_white_24dp"
-            android:title="@string/remove"
+            android:title="@string/share"
             chrome:showAsAction="ifRoom" />
         <item
             android:id="@+id/selection_mode_delete_menu_id"
             android:icon="@drawable/ic_delete_white_24dp"
-            android:title="@string/share"
+            android:title="@string/remove"
             chrome:showAsAction="ifRoom" />
      </group>
 </menu>