Add 5 experimental accessibility features on Chrome OS.

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 2281 matching lines @@
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_AUTOCLICK_DELAY_SHORT" desc="Label for a short autoclick delay option in the settings.">
     short
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_AUTOCLICK_DELAY_LONG" desc="Label for a long autoclick delay option in the settings.">
     long
   </message>
   <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_AUTOCLICK_DELAY_VERY_LONG" desc="Label for a very long autoclick delay option in the settings.">
     very long
   </message>
+  <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_CARET_HIGHLIGHT_DESCRIPTION" desc="In the settings tab, the text next to the checkbox to highlight the caret (the text insertion point) to make it easier to see.">
+    Highlight the caret (when editing text)
+  </message>
+  <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_CURSOR_HIGHLIGHT_DESCRIPTION" desc="In the settings tab, the text next to the checkbox to highlight the mouse cursor to make it easier to see.">
+    Highlight the mouse cursor
+  </message>
+  <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_FOCUS_HIGHLIGHT_DESCRIPTION" desc="In the settings tab, the text next to the checkbox to highlight the focused object to make it easier to see.">
+    Highlight the object with keyboard focus
+  </message>
+  <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_SELECT_TO_SPEAK_DESCRIPTION" desc="In the settings tab, the text next to the checkbox to enable an option to hold a key and click to speak any on-screen text out loud.">
+    Select-to-speak: Hold down Search and click or drag to speak anything
+  </message>
+  <message name="IDS_OPTIONS_SETTINGS_ACCESSIBILITY_SWITCH_ACCESS_DESCRIPTION" desc="In the settings tab, the text next to the checkbox to enable switch access (for users with limited motor control).">
+    Switch access (control the computer with just one or two switches)
+  </message>
+  <message name="IDS_FLAGS_EXPERIMENTAL_ACCESSIBILITY_FEATURES_NAME" desc="Name of the about:flag option for experimental accessibility features.">
+    Experimental acecssibility features
+  </message>
+  <message name="IDS_FLAGS_EXPERIMENTAL_ACCESSIBILITY_FEATURES_DESCRIPTION" desc="Description of the about:flag option for experimental accessibility features.">
+    Enable additional accessibility features in the Settings page.
+  </message>
   <message name="IDS_OPTIONS_SETTINGS_DISPLAY_OPTIONS_BUTTON_LABEL" desc="Label for the button opening display settings tab.">
     Display settings
   </message>
   <message name="IDS_OPTIONS_SETTINGS_DISPLAY_OPTIONS_TAB_TITLE" desc="Title for the display settings tab.">
     Manage displays
   </message>
   <message name="IDS_OPTIONS_SETTINGS_DISPLAY_OPTIONS_OPTIONS" desc="The section title for general options for a selected display.">
     Options:
   </message>
   <message name="IDS_OPTIONS_SETTINGS_DISPLAY_OPTIONS_RESOLUTION" desc="The section title for resolution option for a selected display.">
@@ skipping 4137 matching lines @@
     Over a million apps and games now avaialble on your <ph name="DEVICE_TYPE">$1<ex>Chromebook</ex></ph>.
   </message>
   <message name="IDS_ARC_OPEN_PLAY_STORE_NOTIFICATION_BUTTON" desc="Label for the button in the first-run notification that enables Android apps.">
     Open Play Store
   </message>
   <message name="IDS_ARC_CANCEL_NOTIFICATION_BUTTON" desc="Label for the button in the first-run notification that cancel running Android apps.">
     Cancel
   </message>
 
 </grit-part>