ChromeOS OOBE: Add ARIA-labels for OOBE screens.

chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Chrome OS-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 1674 matching lines @@
   </message>
   <message name="IDS_KEYBOARD_DROPDOWN_TITLE" desc="Title of keyboard selection dropdown menu" meaning="Small title near keyboard dropdown menu suggesting that this is a keyboard layout selector.">
     Keyboard
   </message>
   <message name="IDS_OOBE_WELCOME_NEXT_BUTTON_TEXT" desc="Text on 'Start to use ChromeOS' button" meaning="This is the text label displayed on the 'Next' button for the first ChromeOS initial device setup screen ('Welcome screen').">
     Let's go
   </message>
   <message name="IDS_OOBE_OK_BUTTON_TEXT" desc="Text on 'OK' button" meaning="This is 'OK' text for all 'OK' buttons on ChromeOS initial device setup screens.">
     OK
   </message>
+  <message name="IDS_LANGUAGE_BUTTON_LABEL" desc="Navigation label attached to the 'Select Language' button on ChromeOS initial device setup screen" meaning="The button itself displays only current language name. But for accessibility mode we need full description of this button. So this label suggests that pressing on a button will allow to change current language and input method. And it should also include the name of currently selected language.">
+    Select language and keyboard button. Currently selected language is <ph name="LANGUAGE">$1<ex>English (United States)</ex></ph>.
+  </message>
   <message name="IDS_LANGUAGE_SECTION_TITLE" desc="Title of language selection screen" meaning="A title of the dialog where user should select ChromeOS UI language and default keyboard layout during initial device setup.">
     Choose your language &amp; keyboard
   </message>
   <message name="IDS_ACCESSIBILITY_SECTION_TITLE" desc="Title of accessibility options screen" meaning="A title of the dialog where user can control ChromeOS UI accessibility (like large cursor or screen reader) options during initial device setup.">
     Accessibility settings
   </message>
   <message name="IDS_ACCESSIBILITY_SECTION_HINT" desc="Under-title line on the accessibility options screen" meaning="A hint to the user that these settings help to make device more usable.">
     Configure your device to be more usable.
   </message>
   <message name="IDS_NETWORK_SECTION_TITLE" desc="Title of network selection screen" meaning="A title of the dialog where user should select network to connect to Internet">
@@ skipping 49 matching lines @@
   </message>
   <message name="IDS_VIRTUAL_KEYBOARD_OPTION_OFF" desc="A value for Virtual Keyboard accessibility option when it is off.">
     Off
   </message>
   <message name="IDS_VIRTUAL_KEYBOARD_OPTION_ON" desc="A value for Virtual Keyboard accessibility option when it is on.">
     On
   </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_LANGUAGE_DROPDOWN_LABEL" desc="Navigation label attached to the 'List of languages' dropdown menu on ChromeOS Language and keyboard initial device setup screen" meaning="The menu itself displays only current language name. But for accessibility mode we need full description of this menu. So this label suggests that activating a menu will allow to change current language. And it should also include the name of currently selected language.">
+    Language selection menu. Currently selected language is <ph name="LANGUAGE">$1<ex>English (United States)</ex></ph>.
+  </message>
+  <message name="IDS_KEYBOARD_DROPDOWN_LABEL" desc="Navigation label attached to the 'List of keyboards' dropdown menu on ChromeOS Language and keyboard initial device setup screen" meaning="The menu itself displays only current keyboard layout name. But for accessibility mode we need full description of this menu. So this label suggests that activating a menu will allow to change current input method. And it should also include the name of currently selected input method.">
+    Input method selection menu. Currently selected input method is <ph name="KEYBOARD">$1<ex>English (US)</ex></ph>.
+  </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_TIMEZONE_BUTTON_TEXT" desc="Label on a button that opens timezone selection screen" meaning="Label on a button that opens timezone selection screen during initial device configuration">
     Timezone
   </message>
   <message name="IDS_TIMEZONE_SECTION_TITLE" desc="Title of timezone selection screen" meaning="A title of the dialog where user should select device timezone during initial device configuration">
@@ skipping 4938 matching lines @@
     Attempts left: $1
   </message>
   <message name="IDS_REQUEST_PIN_DIALOG_PIN" desc="The Provider Identification Number abbreviation">
     PIN
   </message>
   <message name="IDS_REQUEST_PIN_DIALOG_PUK" desc="The Personal Unlocking Key (as used in mobile phones) abbreviation">
     PUK
   </message>
 
 </grit-part>