[Offline Pages] Remove a debugging feature and a misleading flag.

chrome/android/java/strings/android_chrome_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- android_chrome_strings.grd contains strings for Chrome for Android.
 
 FAQ:
   - How do I add, change, or remove a string?
       Just update this file.
   - Translations will happen automatically??
       Yes, indeed. Just add your string before the branch point and
       make the description good.
@@ skipping 1430 matching lines @@
       </message>
       <message name="IDS_CONTEXTMENU_COPY_LINK_ADDRESS" desc="Context sensitive menu item for copying the selected link URL / address. [CHAR-LIMIT=30]">
         Copy link address
       </message>
       <message name="IDS_CONTEXTMENU_COPY_LINK_TEXT" desc="Context sensitive menu item for copying the selected link's text. [CHAR-LIMIT=30]">
         Copy link text
       </message>
       <message name="IDS_CONTEXTMENU_SAVE_LINK" desc="Context sensitive menu item for saving the target of a link [CHAR-LIMIT=30]">
         Download link
       </message>
-      <message name="IDS_CONTEXTMENU_SAVE_OFFLINE" desc="Context sensitive menu item for saving an offline version of the page that this link is targeting [CHAR-LIMIT=30]">
-        Save linked page for later
-      </message>
       <message name="IDS_CONTEXTMENU_SAVE_IMAGE" desc="Context sensitive menu item for saving the selected image. [CHAR-LIMIT=30]">
         Download image
       </message>
       <message name="IDS_CONTEXTMENU_OPEN_IMAGE" desc="Context sensitive menu item for opening/viewing the selected image. [CHAR-LIMIT=30]">
         Open image
       </message>
       <message name="IDS_CONTEXTMENU_OPEN_IMAGE_IN_NEW_TAB" desc="Context sensitive menu item for opening/viewing the selected image in a new tab. [CHAR-LIMIT=30]">
         Open image in new tab
       </message>
       <message name="IDS_CONTEXTMENU_LOAD_IMAGES" desc="Context sensitive menu item for Data Saver low fidelity placeholder images that reloads the page with the original images. [CHAR-LIMIT=30]">
@@ skipping 1215 matching lines @@
       <message name="IDS_ITEM_CHOOSER_ITEM_NAME_WITH_ID" desc="To distinguish items with the same name, the item chooser shows the item name with id.">
         <ph name="ITEM_NAME">%1$s<ex>item_name</ex></ph> (<ph name="ITEM_ID">%2$s<ex>item id</ex></ph>)
       </message>
 
       <message name="IDS_INSTANT_APPS_OPEN_IN_APP" desc="Button label for the user action that will open an Instant App.">
         Open app
       </message>
     </messages>
   </release>
 </grit>