[AiS] Add a new AutocompleteMatchType for Answers in Suggest.

chrome/browser/autocomplete/autocomplete_controller.cc

Index: chrome/browser/autocomplete/autocomplete_controller.cc
diff --git a/chrome/browser/autocomplete/autocomplete_controller.cc b/chrome/browser/autocomplete/autocomplete_controller.cc
index 1bb947fd9ef1d9d9207dbb88fa13f83a5db9c689..09a82bd1684ddcd59c4b253cafc7d518ec4a9e5c 100644
--- a/chrome/browser/autocomplete/autocomplete_controller.cc
+++ b/chrome/browser/autocomplete/autocomplete_controller.cc
@@ -80,6 +80,10 @@ void AutocompleteMatchToAssistedQuery(
       *subtype = 44;
       return;
     }
+    case AutocompleteMatchType::SEARCH_SUGGEST_ANSWER: {
+      *subtype = 70;
+      return;
+    }
     case AutocompleteMatchType::NAVSUGGEST: {
       // Do not set subtype here; subtype may have been set above.
       *type = 5;