Spoken feedback sounds for user photo capture/discard at image picker added.

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 2097 matching lines @@
   </message>
   <message name="IDS_OPTIONS_PHOTO_CAPTURE_ACCESSIBLE_TEXT" desc="The accessible message to speak to announce that a photo was captured.">
     Captured photo
   </message>
   <message name="IDS_OPTIONS_PHOTO_DISCARD_ACCESSIBLE_TEXT" desc="The accessible message to speak to announce that a photo was discarded.">
     Discarded photo
   </message>
   <message name="IDS_OPTIONS_CHANGE_PICTURE_FLIP_PHOTO" desc="The text on the button to flip the camera image horizontally.">
     Flip camera image horizontally
   </message>
+  <message name="IDS_OPTIONS_PHOTO_FLIP_ACCESSIBLE_TEXT" desc="The accessible message to speak to announce horizontal flip of camera image.">
+    Photo flipped
+  </message>
+  <message name="IDS_OPTIONS_PHOTO_FLIPBACK_ACCESSIBLE_TEXT" desc="The accessible message to speak to announce horizontal back-flip of camera image to not-flipped state.">
+    Photo flipped back
+  </message>
   <message name="IDS_OPTIONS_CHANGE_PICTURE_PREVIEW_ALT" desc="Alt text for the big preview of user image.">
     User image preview
   </message>
   <message name="IDS_OPTIONS_CHANGE_PICTURE_PROFILE_PHOTO" desc="The text on the Google profile photo of the user.">
     Google Profile photo
   </message>
   <message name="IDS_OPTIONS_CHANGE_PICTURE_PROFILE_LOADING_PHOTO" desc="The text on the loading stub for Google profile image.">
     Google Profile photo (loading)
   </message>
   <message name="IDS_IMAGE_SCREEN_PROFILE_PHOTO" desc="The title of the Google profile photo of the user on image selection screen. Please keep in sync with IDS_OPTIONS_CHANGE_PICTURE_PROFILE_PHOTO.">
@@ skipping 3148 matching lines @@
     Failed to set adapter power.
   </message>
   <message name="IDS_NFC_DEBUG_ERROR_FAILED_TO_SET_POLLING" desc="Error message shown when polling state could not be set." translateable="false">
     Failed to start/stop polling.
   </message>
   <message name="IDS_NFC_DEBUG_ERROR_FAILED_TO_SUBMIT_PREFIX" desc="Error message shown when an NDEF form could not be submitted." translateable="false">
     Failed to submit NDEF:
   </message>
 
 </grit-part>