Allow site-search to work with --restrict-instant-to-search.

chrome/browser/instant/instant_controller.cc

Index: chrome/browser/instant/instant_controller.cc
diff --git a/chrome/browser/instant/instant_controller.cc b/chrome/browser/instant/instant_controller.cc
index d65c5bcca9f862b1e3ddc4098e56af74d64a021a..fa943ff56cc0f0adeedbfab2389f83960fe96154 100644
--- a/chrome/browser/instant/instant_controller.cc
+++ b/chrome/browser/instant/instant_controller.cc
@@ -649,7 +649,8 @@ bool InstantController::ShouldShowPreviewFor(const AutocompleteMatch& match,
   if (cl->HasSwitch(switches::kRestrictInstantToSearch) &&
       match.type != AutocompleteMatch::SEARCH_WHAT_YOU_TYPED &&
       match.type != AutocompleteMatch::SEARCH_HISTORY &&
-      match.type != AutocompleteMatch::SEARCH_SUGGEST) {
+      match.type != AutocompleteMatch::SEARCH_SUGGEST &&
+      match.type != AutocompleteMatch::SEARCH_OTHER_ENGINE) {
     return false;
   }