MD Settings: Update Protected Content for redesign

chrome/app/settings_strings.grdp

Index: chrome/app/settings_strings.grdp
diff --git a/chrome/app/settings_strings.grdp b/chrome/app/settings_strings.grdp
index 55ea29cf7dd643317de585816ac1baaf70d5b7e1..f8e7c26eb3e24027c0e763962f76250d9e007f22 100644
--- a/chrome/app/settings_strings.grdp
+++ b/chrome/app/settings_strings.grdp
@@ -1753,12 +1753,17 @@
   <message name="IDS_SETTINGS_SITE_SETTINGS_PROTECTED_CONTENT" desc="Label for the protected content site settings.">
     Protected Content
   </message>
-  <message name="IDS_SETTINGS_SITE_SETTINGS_PROTECTED_CONTENT_EXPLANATION" desc="Text that is displayed on the Protected Content section of Content Settings. This text explains that enabling protected content may require using a uniquely identifiable machine identifier.">
-    Some content services use unique identifiers for the purposes of authorizing access to protected content.
-  </message>
   <message name="IDS_SETTINGS_SITE_SETTINGS_PROTECTED_CONTENT_ENABLE" desc="Label for the toggle enabling protected content.">
     Allow sites to play protected content (recommended)
   </message>
+  <if expr="chromeos or is_win">
+    <message name="IDS_SETTINGS_SITE_SETTINGS_PROTECTED_CONTENT_IDENTIFIERS_EXPLANATION" desc="Text that is displayed on the Protected Content section of Content Settings. This text explains that enabling protected content may require using a uniquely identifiable machine identifier.">
+      Some content services use unique identifiers for the purposes of authorizing access to protected content.
+    </message>
+    <message name="IDS_SETTINGS_SITE_SETTINGS_PROTECTED_CONTENT_ENABLE_IDENTIFIERS" desc="The label of the checkbox for enabling machine identifiers to uniquely identiy the user for protected content.">
+      Allow identifiers for protected content (computer restart may be required)
+    </message>
+  </if>
   <message name="IDS_SETTINGS_SITE_SETTINGS_UNSANDBOXED_PLUGINS" desc="Label for the unsandboxed plugin access site settings.">
     Unsandboxed plugin access
   </message>