Update Enhanced Playback dialog string.

R=ericde@chromium.org
TBR=engedy@chromium.org
BUG=344643

Review URL: https://codereview.chromium.org/171483002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251881 0039d316-1c4b-4281-b951-d872f2087c98

chrome/app/chromeos_strings.grdp

@@ -4756,7 +4756,7 @@ Battery full
 
   <!-- 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