Update Enhanced Playback dialog string.

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="pp_ifdef('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 4715 matching lines @@
     To check for updates, please use Ethernet or Wi-Fi.
   </message>
 
   <!-- Genius App -->
   <message name="IDS_GENIUS_APP_NAME" desc="Name of the genius app in the app launcher">
     Get Help
   </message>
 
   <!-- HDCP verification UI -->
   <message name="IDS_PLATFORM_VERIFICATION_DIALOG_HEADLINE" desc="The label to describe what the dialog wants to confirm.">
-    <ph name="DOMAIN">$1<ex>example.com</ex></ph> requires unique identification of your device, by Google, to enable an enhanced playback experience. <ph name="LEARN_MORE">$2<ex>Learn more</ex></ph>.
+    <ph name="DOMAIN">$1<ex>example.com</ex></ph> requires your device's identity to be verified, by Google, to determine eligibility for enhanced playback of protected media. <ph name="LEARN_MORE">$2<ex>Learn more</ex></ph>.
   </message>
   <message name="IDS_PLATFORM_VERIFICATION_DIALOG_ALLOW" desc="The button label to allow access of HD playback.">
     OK, I got it
   </message>
   <message name="IDS_PLATFORM_VERIFICATION_DIALOG_DENY" desc="The button label to deny access of HD playback.">
     Disable on <ph name="DOMAIN">$1<ex>example.com</ex></ph>
   </message>
 
   <!-- Multi-profiles mode -->
   <message name="IDS_MULTIPROFILES_INTRO_HEADLINE" desc="Describes which feature multi-profiles intro dialog presents.">
@@ skipping 194 matching lines @@
     We see that you've ordered a replacement charger.
   </message>
   <message name="IDS_CHARGER_REPLACEMENT_CHARGER_MORE_INFO" desc="Text for fining more info for charger">
     You can find more info at
   </message>
   <message name="IDS_CHARGER_REPLACEMENT_DIALOG_TITLE" desc="Title of the charger replacement UI dialg">
     Check charger
   </message>
 
 </grit-part>