Fix constructor for AutocompleteMatch to initialize |subtype_identifier|

components/omnibox/browser/autocomplete_match.cc

Index: components/omnibox/browser/autocomplete_match.cc
diff --git a/components/omnibox/browser/autocomplete_match.cc b/components/omnibox/browser/autocomplete_match.cc
index c7e03045969160a5097e40211bc5cde24b888985..801b0d7cb449e73c3b372160c62545b969bab388 100644
--- a/components/omnibox/browser/autocomplete_match.cc
+++ b/components/omnibox/browser/autocomplete_match.cc
@@ -85,8 +85,8 @@ AutocompleteMatch::AutocompleteMatch()
       swap_contents_and_description(false),
       transition(ui::PAGE_TRANSITION_GENERATED),
       type(AutocompleteMatchType::SEARCH_WHAT_YOU_TYPED),
-      from_previous(false) {
-}
+      subtype_identifier(0),
+      from_previous(false) {}
 
 AutocompleteMatch::AutocompleteMatch(AutocompleteProvider* provider,
                                      int relevance,
@@ -100,8 +100,8 @@ AutocompleteMatch::AutocompleteMatch(AutocompleteProvider* provider,
       swap_contents_and_description(false),
       transition(ui::PAGE_TRANSITION_TYPED),
       type(type),
-      from_previous(false) {
-}
+      subtype_identifier(0),
+      from_previous(false) {}
 
 AutocompleteMatch::AutocompleteMatch(const AutocompleteMatch& match)
     : provider(match.provider),