Parametrize Suggest polling strategy and delay. Also add a parameter

chrome/browser/ui/search/instant_extended_interactive_uitest.cc

Index: chrome/browser/ui/search/instant_extended_interactive_uitest.cc
diff --git a/chrome/browser/ui/search/instant_extended_interactive_uitest.cc b/chrome/browser/ui/search/instant_extended_interactive_uitest.cc
index 06d196da2e3c2ef32f9a103b7b199f9190bbd1db..56dba032e40e70838a0748166a3bde5ddbea61df 100644
--- a/chrome/browser/ui/search/instant_extended_interactive_uitest.cc
+++ b/chrome/browser/ui/search/instant_extended_interactive_uitest.cc
@@ -57,6 +57,7 @@
 #include "components/omnibox/autocomplete_match.h"
 #include "components/omnibox/autocomplete_provider.h"
 #include "components/omnibox/autocomplete_result.h"
+#include "components/omnibox/omnibox_field_trial.h"
 #include "components/omnibox/search_provider.h"
 #include "components/search_engines/template_url_service.h"
 #include "components/sessions/serialized_navigation_entry.h"
@@ -816,8 +817,7 @@ IN_PROC_BROWSER_TEST_F(InstantExtendedPrefetchTest, SetPrefetchQuery) {
       ui_test_utils::BROWSER_TEST_NONE);
   new_tab_observer.Wait();
 
-  omnibox()->model()->autocomplete_controller()->search_provider()->
-      kMinimumTimeBetweenSuggestQueriesMs = 0;
+  OmniboxFieldTrial::kMinimumTimeBetweenSuggestQueriesMs = 0;
 
   // Set the fake response for search query.
   fake_factory()->SetFakeResponse(instant_url().Resolve("#q=flowers"),
@@ -879,8 +879,7 @@ IN_PROC_BROWSER_TEST_F(InstantExtendedPrefetchTest, ClearPrefetchedResults) {
       ui_test_utils::BROWSER_TEST_NONE);
   new_tab_observer.Wait();
 
-  omnibox()->model()->autocomplete_controller()->search_provider()->
-      kMinimumTimeBetweenSuggestQueriesMs = 0;
+  OmniboxFieldTrial::kMinimumTimeBetweenSuggestQueriesMs = 0;
 
   // Set the fake response for search query.
   fake_factory()->SetFakeResponse(instant_url().Resolve("#q=flowers"),