A11y setting: mono audio UI

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>
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   </message>
   <message name="IDS_OOBE_HIGH_CONTRAST_MODE_OPTION" desc="High contrast mode option shown on OOBE screens accessibility menu.">
     High contrast mode
   </message>
   <message name="IDS_OOBE_SCREEN_MAGNIFIER_OPTION" desc="Screen magnifier option shown on OOBE screens accessibility menu.">
     Screen magnifier
   </message>
   <message name="IDS_OOBE_VIRTUAL_KEYBOARD_OPTION" desc="Virtual keyboard option shown on the OOBE screens accessibility menu.">
     On-screen keyboard
   </message>
+  <message name="IDS_OOBE_MONO_AUDIO_OPTION" desc="Mono audio option shown on the OOBE screens accessibility menu.">
+    Play the same audio through all speakers (mono audio)
+  </message>
   <message name="IDS_OOBE_CLOSE_ACCESSIBILITY_MENU" desc="Text to be spoken when focus is set to the close button of accessibility options menu.">
     Close accessibility menu
   </message>
   <message name="IDS_OOBE_OTHER_LANGUAGES" desc="Option group name dividing vendor-configured languages from other available languages in out-of-box 'Select language' select control.">
     Other languages
   </message>
   <message name="IDS_OOBE_OTHER_KEYBOARD_LAYOUTS" desc="Option group name dividing vendor-configured keyboard layouts from other available layouts in out-of-box 'Select your keyboard' select control.">
     Other keyboards
   </message>
   <message name="IDS_LOGIN_TITLE" desc="Title of sign-in box">
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   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_SCREEN_MAGNIFIER_PARTIAL" desc="In the settings tab, the option indication the screen magnifier is set to lens (partial screen) mode.">
     Lens
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_TOUCHPAD_TAP_DRAGGING_DESCRIPTION" desc="In the settings tab, the text next to the checkbox for tap dragging.">
     Enable tap dragging
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_VIRTUAL_KEYBOARD_DESCRIPTION" desc="In the settings tab, the text next to the checkbox for virtual keyboard.">
     Enable on-screen keyboard
   </message>
+  <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_MONO_AUDIO_DESCRIPTION" desc="In the settings tab, the text next to the checkbox for mono audio output.">
+    Play the same audio through all speakers (mono audio)
+  </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_SHOULD_ALWAYS_SHOW_MENU" desc="In the settings tab, the text next to the checkbox to show the accessibility tray menu regardless of the state of a11y features.">
     Show accessibility options in the system menu
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_STICKY_KEYS_DESCRIPTION" desc="In the settings tab, the text next to the checkbox for the sticky keys.">
     Enable sticky keys (to perform keyboard shortcuts by typing them sequentially)
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_AUTOCLICK_DESCRIPTION" desc="In the settings tab, the text next to the checkbox for automatic clicking.">
     Automatically click when the mouse pointer stops
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_AUTOCLICK_DROPDOWN_DESCRIPTION" desc="In the settings tab, the text next to the autoclick delay dropdown.">
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   <message name="IDS_ARC_SERVER_COMMUNICATION_ERROR" desc="Android sign-in error because of server communication error">
     Server communication error
   </message>
   <message name="IDS_FLAGS_ENABLE_IME_MENU_NAME" desc="Name of the about: flag for enabling opt-in IME menu.">
     Enable opt-in IME menu
     </message>
   <message name="IDS_FLAGS_ENABLE_IME_MENU_DESCRIPTION" desc="Description of the about: flag for enabling opt-in IME menu.">
     Enable access to the new IME menu in the Language Settings page.
   </message>
 </grit-part>