Settings to remap Backspace and Escape keys

chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- ChromeOS-specific strings (included from generated_resources.grd).
      Everything in this file is wrapped in <if expr="chromeos">. -->
 <grit-part>
   <message name="IDS_EMPTY_STRING" desc="Empty string, exist only to make code generic. No translation required.">
   </message>
   <!-- Idle logout dialog for retail mode -->
   <message name="IDS_IDLE_LOGOUT_TITLE" desc="Dialog title for the idle logout dialog. Used in retail mode only.">
     Are you still there?
   </message>
@@ skipping 3599 matching lines @@
     Ctrl
   </message>
   <message name="IDS_OPTIONS_SETTINGS_LANGUAGES_KEY_LEFT_ALT_LABEL"
            desc="The label for customizing the left alt key in the 'Keyboard settings' overlay">
     Alt
   </message>
   <message name="IDS_OPTIONS_SETTINGS_LANGUAGES_KEY_CAPS_LOCK_LABEL"
            desc="The label for customizing the caps-lock key in the 'Keyboard settings' overlay">
     Caps Lock
   </message>
+  <message name="IDS_OPTIONS_SETTINGS_LANGUAGES_KEY_ESCAPE_KEY_LABEL"
+           desc="The label for customizing the escape key in the 'Keyboard settings' overlay">
+    Escape
+  </message>
+  <message name="IDS_OPTIONS_SETTINGS_LANGUAGES_KEY_BACKSPACE_KEY_LABEL"
+           desc="The label for customizing the backspace key in the 'Keyboard settings' overlay">
+    Backspace
+  </message>
   <message name="IDS_OPTIONS_SETTINGS_LANGUAGES_KEY_DIAMOND_KEY_LABEL"
            desc="The label for customizing the diamond key in the 'Keyboard settings' overlay">
     Diamond
   </message>
   <message name="IDS_OPTIONS_SETTINGS_LANGUAGES_KEY_SEARCH"
            desc="The dropdown list item for the search key in the 'Customize modifier keys' section in the 'Keyboard settings' overlay">
     Search
   </message>
   <message name="IDS_OPTIONS_SETTINGS_LANGUAGES_KEY_LEFT_CTRL"
            desc="The dropdown list item for the left ctrl key in the 'Customize modifier keys' section in the 'Keyboard settings' overlay">
@@ skipping 2751 matching lines @@
   <message name="IDS_CRITICALLY_LOW_DISK_NOTIFICATION_TITLE" desc="Title of the notification warning users that they are critically low on disk space.">
     Device disk space critically low
   </message>
   <message name="IDS_CRITICALLY_LOW_DISK_NOTIFICATION_MESSAGE" desc="Notification text warning users that they are critically low on disk space.">
     Free up disk space or device will become unresponsive.
   </message>
   <message name="IDS_LOW_DISK_NOTIFICATION_BUTTON" desc="Button on the low disk notification to open storage management.">
     Manage storage
   </message>
 </grit-part>