Use whether a query is from the app list to determine the RLZ parameter.

chrome/browser/ui/app_list/search/omnibox_provider.cc

Index: chrome/browser/ui/app_list/search/omnibox_provider.cc
diff --git a/chrome/browser/ui/app_list/search/omnibox_provider.cc b/chrome/browser/ui/app_list/search/omnibox_provider.cc
index 4ca991c6aa0d4307578304576eff203db102a41a..99ae67f3c35ce26fe0f98e090dbb5c7496f40313 100644
--- a/chrome/browser/ui/app_list/search/omnibox_provider.cc
+++ b/chrome/browser/ui/app_list/search/omnibox_provider.cc
@@ -8,6 +8,7 @@
 #include "chrome/browser/autocomplete/autocomplete_controller.h"
 #include "chrome/browser/autocomplete/autocomplete_input.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
+#include "chrome/browser/autocomplete/search_provider.h"
 #include "chrome/browser/ui/app_list/search/chrome_search_result.h"
 #include "chrome/browser/ui/browser_navigator.h"
 #include "chrome/common/metrics/proto/omnibox_event.pb.h"
@@ -135,7 +136,9 @@ OmniboxProvider::OmniboxProvider(Profile* profile)
       controller_(new AutocompleteController(
           profile,
           this,
-          AutocompleteClassifier::kDefaultOmniboxProviders)) {
+          AutocompleteClassifier::kDefaultOmniboxProviders &
+              ~AutocompleteProvider::TYPE_ZERO_SUGGEST)) {
+  controller_->search_provider()->set_in_app_list();
 }
 
 OmniboxProvider::~OmniboxProvider() {}