MD Settings: Migrate enable-translation toggle from non-MD settings page.

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 cf3abaf066f5547717138b347d3e6bdbbc1268c4..955fd64edf69a624b3cf0e1088770a7bbff7b75d 100644
--- a/chrome/app/settings_strings.grdp
+++ b/chrome/app/settings_strings.grdp
@@ -1458,6 +1458,9 @@
   <message name="IDS_SETTINGS_LANGUAGES_OFFER_TO_TRANSLATE_IN_THIS_LANGUAGE" desc="The label for a checkbox which indicates whether or not pages in this language should be translated by default.">
     Offer to translate pages in this language
   </message>
+  <message name="IDS_SETTINGS_LANGUAGES_OFFER_TO_ENABLE_TRANSLATE" desc="The label of the check-box that enables the prompt to translate a page.">
+    Offer to translate pages that aren't in a language you read.
+  </message>
   <if expr="chromeos">
     <message name="IDS_SETTINGS_LANGUAGES_INPUT_METHODS_LIST_TITLE" desc="Title for the current input method in the header for the collapsible list of enabled input methods (keyboard layouts and input method editors).">
       Input method