Update string for content protection dialog on Chrome OS

BUG=1146646
TEST=Verified new string in UI

Change-Id: Ia45dade605890c7cb024f660798490ca97f54d92
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2605288
Commit-Queue: Jeffrey Kardatzke <jkardatzke@google.com>
Auto-Submit: Jeffrey Kardatzke <jkardatzke@google.com>
Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#839635}

chrome/app/chromeos_strings.grdp

@@ -3118,7 +3118,7 @@
 
   <!-- Platform 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> wants your device's identity to be verified, by Google, to determine eligibility for enhanced playback of protected content.
+    <ph name="DOMAIN">$1<ex>example.com</ex></ph> wants to identify your device so it can play the highest quality protected video and audio.
   </message>
 
   <!-- Network portal notification -->

chrome/app/chromeos_strings_grdp/IDS_PLATFORM_VERIFICATION_DIALOG_HEADLINE.png.sha1

+54bdbaf785801685067b449ddca9515557b00bb9
\ No newline at end of file