Make the focus, caret, and cursor highlights fade out.

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 2360 matching lines @@
   <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)
+    Highlight the text caret when it appears or moves.
   </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 when it's moving to make it easier to see.">
-    Highlight the mouse cursor when it's moving
+    Highlight the mouse cursor when it's moving.
   </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
+    Highlight the object with keyboard focus when it changes.
   </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>
@@ skipping 4223 matching lines @@
   <message name="IDS_ARC_ANDROID_MANAGEMENT_REQUIRED_ERROR" desc="Error message shown when Android management is required for an unmanaged Chrome OS user.">
     Your organization has not enabled Android Apps for your account. Contact your administrator for more information.
   </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>