Revert r42156, r42157, r42160. Allow dynamic switching in and out of sidetabs...

chrome/app/generated_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- This file contains definitions of resources that will be translated for
 each locale. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/generated_resources.h" type="rc_header">
       <emit emit_type='prepend'></emit>
@@ skipping 4326 matching lines @@
         </message>
         <message name="IDS_TAB_CXMENU_CLOSETABSOPENEDBY" desc="The label of the 'Close Tabs opened by this Tab' Tab context menu item.">
           Close tabs opened by this tab
         </message>
         <message name="IDS_TAB_CXMENU_PIN_TAB" desc="The label of the tab context menu item for pinning a tab.">
           Pin tab
         </message>
         <message name="IDS_TAB_CXMENU_BOOKMARK_ALL_TABS" desc="In Title Case: The label of the tab context menu item for creating a bookmark folder containing an entry for each open tab.">
           Bookmark all tabs...
         </message>
-        <message name="IDS_TAB_CXMENU_USE_VERTICAL_TABS" desc="Use the vertical tab strip">
-          Use side tabs
-        </message>
       </if>
       <if expr="pp_ifdef('use_titlecase')">
         <message name="IDS_TAB_CXMENU_NEWTAB" desc="In Title Case: The label of the 'New Tab' Tab context menu item.">
           New Tab
         </message>
         <message name="IDS_TAB_CXMENU_RELOAD" desc="In Title Case: The label of the 'Reload' Tab context menu item.">
           Reload
         </message>
         <message name="IDS_TAB_CXMENU_DUPLICATE" desc="In Title Case: The label of the 'Duplicate' Tab context menu item.">
           Duplicate
@@ skipping 2824 matching lines @@
       <message name="IDS_LANGUAGES_MORE" desc="Main language list 'more' link. Expands all possible languages, not only the main ones.">
         More...
       </message>
     </if>
      <message name="IDS_BOOKMARK_BAR_IMPORT_LINK" desc="text shown for importing ">
        Import bookmarks now...
      </message>
     </messages>
   </release>
 </grit>