[unified-consent] Add missing settings strings

 - strings for the spell check hint are added
 - the autocomplete-searches description is updated

Bug: 855945, 864793
Change-Id: I33b520fbef30122e6add794d71d8f48053fc253c
Reviewed-on: https://chromium-review.googlesource.com/1143304Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Commit-Queue: Thomas Tangl <tangltom@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576469}

chrome/app/settings_strings.grdp

@@ -2403,7 +2403,7 @@
     Autocomplete searches and URLs
   </message>
   <message name="IDS_SETTINGS_SUGGEST_PREF_DESC_UNIFIED_CONSENT" desc="The description of the 'Use Suggest' preference">
-    Sends searches from the address bar and search box and some cookies to your default search engine
+    Sends some cookies and searches from the address bar and search box to your default search engine
   </message>
   <message name="IDS_SETTINGS_NETWORK_PREDICTION_ENABLED_LABEL" desc="In the advanced options tab, the text next to the checkbox that enables prediction of network actions.  Actions include browser-initiated DNS prefetching, TCP and SSL preconnection, and prerendering of webpages.">
     Use a prediction service to load pages more quickly
@@ -2435,6 +2435,12 @@
   <message name="IDS_SETTINGS_SPELLING_PREF_UNIFIED_CONSENT" desc="The documentation string of the 'Use Spelling' preference">
     Enhanced spell check
   </message>
+  <message name="IDS_SETTINGS_SPELLING_TURN_ON_HINT_UNIFIED_CONSENT" desc="Informs user how to change their settings to be able to turn on spell check.">
+    To turn this on, first turn on spell check in <ph name="BEGIN_LINK">&lt;a href="$1" target=&quot;_blank&quot;&gt;<ex>&lt;a href="$1" target=&quot;_blank&quot;&gt;</ex></ph>Languages and input<ph name="END_LINK">&lt;/a&gt;<ex>&lt;/a&gt;</ex></ph>
+  </message>
+  <message name="IDS_SETTINGS_SPELLING_TURN_ON_HINT_UNIFIED_CONSENT_MAC" desc="Informs user how to change their settings on Mac to be able to turn on spell check.">
+    To turn this on, first select Check Spelling While Typing in the Edit menu
+  </message>
   <message name="IDS_SETTINGS_ENABLE_LOGGING" desc="The label of the checkbox to enable/disable crash and user metrics logging">
     Automatically send usage statistics and crash reports to Google
   </message>