Omnibox: Call Stop() on all Providers After Certain Amount of Time

chrome/browser/autocomplete/autocomplete_controller.h

Index: chrome/browser/autocomplete/autocomplete_controller.h
diff --git a/chrome/browser/autocomplete/autocomplete_controller.h b/chrome/browser/autocomplete/autocomplete_controller.h
index 32fabd1816d56e4efda995dfd380bf63f170a9af..5094c1604f27e03c34728b7200c687d793ea453c 100644
--- a/chrome/browser/autocomplete/autocomplete_controller.h
+++ b/chrome/browser/autocomplete/autocomplete_controller.h
@@ -179,9 +179,12 @@ class AutocompleteController : public AutocompleteProviderListener {
   // Updates |done_| to be accurate with respect to current providers' statuses.
   void CheckIfDone();
 
-  // Starts the expire timer.
+  // Starts |expire_timer_|.
   void StartExpireTimer();
 
+  // Starts |stop_timer_|.
+  void StartStopTimer();
+
   AutocompleteControllerDelegate* delegate_;
 
   // A list of all providers.
@@ -217,6 +220,13 @@ class AutocompleteController : public AutocompleteProviderListener {
   // invokes |ExpireCopiedEntries|.
   base::OneShotTimer<AutocompleteController> expire_timer_;
 
+  // Timer used to tell the providers to Stop() searching for matches.
+  base::OneShotTimer<AutocompleteController> stop_timer_;
+
+  // True if the user is in the "stop timer" field trial.  If so, the
+  // controller uses the |stop_timer_|.
+  const bool in_stop_timer_field_trial_;
+
   // True if a query is not currently running.
   bool done_;