Add "Paste as plain text" into text selection toolbar overflow

content/public/android/java/res/menu/select_action_menu.xml

 <?xml version="1.0" encoding="utf-8"?>
 
 <!-- Copyright 2013 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.
 -->
 
 <!--suppress AlwaysShowAction -->
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
     <!-- The orderInCategory starts with 2 to give a room for
          assist menu item. Remove the ordering when Android
          can reorder the assist menu item itself.
          -->
     <group
         android:id="@+id/select_action_menu_default_items">
         <item
             android:id="@+id/select_action_menu_cut"
             android:icon="?android:attr/actionModeCutDrawable"
             android:title="@android:string/cut"
             android:showAsAction="always|withText"
             android:alphabeticShortcut="x"
             android:orderInCategory="2"
             />
-       <item
+        <item
             android:id="@+id/select_action_menu_copy"
             android:icon="?android:attr/actionModeCopyDrawable"
             android:title="@android:string/copy"
             android:showAsAction="always|withText"
             android:alphabeticShortcut="c"
             android:orderInCategory="3"
             />
-       <item
+        <item
             android:id="@+id/select_action_menu_paste"
             android:icon="?android:attr/actionModePasteDrawable"
             android:title="@android:string/paste"
             android:showAsAction="always|withText"
             android:alphabeticShortcut="v"
             android:orderInCategory="4"
             />
-       <item
+        <item
             android:id="@+id/select_action_menu_share"
             android:title="@string/actionbar_share"
             android:showAsAction="always|withText"
             style="@style/SelectActionMenuShare"
             android:orderInCategory="5"
             />
-       <item
+        <item
             android:id="@+id/select_action_menu_select_all"
             android:icon="?android:attr/actionModeSelectAllDrawable"
             android:title="@android:string/selectAll"
             android:showAsAction="always|withText"
             android:alphabeticShortcut="a"
             android:orderInCategory="6"
             />
-       <item
+        <!-- TODO(ctzsm): Change title to paste_as_plain_text after O SDK roll. -->
+        <item
+            android:id="@+id/select_action_menu_paste_as_plain_text"
+            android:title="@android:string/paste"

[aelias_OOO_until_Jul13, 2017/05/01 23:25:41]

Can this field be removed for now since it's set elsewhere?  There doesn't seem
a need for a bogus field, better to just keep it absent in this spot.

[Shimi Zhang, 2017/05/02 00:17:45]

Done.

+            android:showAsAction="always|withText"
+            android:orderInCategory="7"
+            />
+        <item
             android:id="@+id/select_action_menu_web_search"
             android:title="@string/actionbar_web_search"
             android:showAsAction="always|withText"
             style="@style/SelectActionMenuWebSearch"
-            android:orderInCategory="7"
+            android:orderInCategory="8"
             />
     </group>
     <group
         android:id="@+id/select_action_menu_text_processing_menus"
-        android:orderInCategory="8">
+        android:orderInCategory="9">
     </group>
 </menu>