A working implementation of AQS (Assisted Query Stats).

chrome/browser/autocomplete/autocomplete.h

Index: chrome/browser/autocomplete/autocomplete.h
diff --git a/chrome/browser/autocomplete/autocomplete.h b/chrome/browser/autocomplete/autocomplete.h
index d928e0a3875aa8f4fdbdbcae7db8ab9757225351..38c31bfc1e82b0ebb3b8d00fde889b6f92ecd0ff 100644
--- a/chrome/browser/autocomplete/autocomplete.h
+++ b/chrome/browser/autocomplete/autocomplete.h
@@ -747,6 +747,11 @@ class AutocompleteController : public ACProviderListener {
   // provider name as a description on the first match in the group.
   void UpdateKeywordDescriptions(AutocompleteResult* result);
 
+  // For each AutocompleteMatch returned by SearchProvider, updates the
+  // destination_url iff the provider's TemplateURL supports assisted query
+  // stats.
+  void UpdateAssistedQueryStats(AutocompleteResult* result);
+
   // Calls AutocompleteControllerDelegate::OnResultChanged() and if done sends
   // AUTOCOMPLETE_CONTROLLER_RESULT_READY.
   void NotifyChanged(bool notify_default_match);