Implement delete button in action bar for password entry editor

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 351 matching lines @@
       </message>
       <message name="IDS_PASSWORD_ENTRY_EDITOR_COPY_STORED_USERNAME" desc='Content description for the button that copies the stored username.'>
         Copy username
       </message>
       <message name="IDS_PASSWORD_ENTRY_EDITOR_COPY_STORED_PASSWORD" desc='Content description for the button that copies the stored password.'>
         Copy password
       </message>
       <message name="IDS_PASSWORD_ENTRY_EDITOR_VIEW_STORED_PASSWORD" desc='Content description for the button that allows users to view the stored password upon reauthentication.'>
         Unmask password
       </message>
+      <message name="IDS_PASSWORD_ENTRY_EDITOR_DELETE_STORED_PASSWORD_ACTION_TITLE" desc='Title for button on action bar that deletes the stored password.'>
+        Delete password
+      </message>
+      <message name="IDS_PASSWORD_ENTRY_EDITOR_DELETE_STORED_PASSWORD" desc='Content description for the button that allows users to delete the stored password.'>
+        Delete stored password
+      </message>
 
       <!-- Homepage preferences -->
       <message name="IDS_HOMEPAGE_DEFAULT_TITLE" desc="Label for checkbox to use the default homepage">
         Default
       </message>
       <message name="IDS_OPTIONS_HOMEPAGE_EDIT_TITLE" desc="The title of the screen that allows users to change the URL that opens when they tap on the home page button in the omnibox.">
         Edit home page
       </message>
       <message name="IDS_OPTIONS_HOMEPAGE_EDIT_LABEL" desc="The label for the edit text field that allows the user to change the URL that is opened when they tap on the home page button in the omnibox.">
         Open this page
@@ skipping 2302 matching lines @@
         Tap this button for quick access to your tabs.
       </message>
 
       <!-- Item Chooser UI strings -->
       <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>
     </messages>
   </release>
 </grit>