[Bookmarks] Refactor search view to use SelectableListLayout paradigm

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

 <?xml version="1.0" encoding="utf-8"?>
 <!-- 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. -->
 
 <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/edit_menu_id"
             android:icon="@drawable/bookmark_edit_normal"
             android:title="@string/bookmark_action_bar_edit_folder"
             android:visible="false"
             chrome:showAsAction="ifRoom"/>
         <item
             android:id="@+id/search_menu_id"
             android:icon="@drawable/ic_search"
-            android:title="@null"
+            android:title="@string/search"
             android:visible="false"
             chrome:showAsAction="ifRoom"/>
         <item
             android:id="@+id/close_menu_id"
             android:icon="@drawable/btn_close"
             android:title="@string/bookmark_action_bar_close"
             chrome:showAsAction="ifRoom"/>
     </group>
     <group
         android:id="@+id/selection_mode_menu_group"
@@ skipping 17 matching lines @@
             android:id="@+id/selection_open_in_new_tab_id"
             android:title="@string/contextmenu_open_in_new_tab"
             chrome:showAsAction="never"/>
         <item
             android:id="@+id/selection_open_in_incognito_tab_id"
             android:title="@string/contextmenu_open_in_incognito_tab"
             chrome:showAsAction="never"/>
     </group>
 
 </menu>