remove ntp app install hint

chrome/browser/ui/webui/ntp/new_tab_page_handler.cc

Index: chrome/browser/ui/webui/ntp/new_tab_page_handler.cc
diff --git a/chrome/browser/ui/webui/ntp/new_tab_page_handler.cc b/chrome/browser/ui/webui/ntp/new_tab_page_handler.cc
index 28c6558889040c0b15ed9974e8e416ff058401e9..c4082c4f2e0f4416cdc985813743bdbc72c6aed2 100644
--- a/chrome/browser/ui/webui/ntp/new_tab_page_handler.cc
+++ b/chrome/browser/ui/webui/ntp/new_tab_page_handler.cc
@@ -57,15 +57,6 @@ void NewTabPageHandler::RegisterMessages() {
         shown_page_type, kHistogramEnumerationMax);
   }
 
-  static const bool webstore_link_experiment_exists =
-      base::FieldTrialList::TrialExists(kWebStoreLinkExperiment);
-  if (webstore_link_experiment_exists) {
-    UMA_HISTOGRAM_ENUMERATION(
-        base::FieldTrial::MakeName(kDefaultPageTypeHistogram,
-                                   kWebStoreLinkExperiment),
-        shown_page_type, kHistogramEnumerationMax);
-  }
-
   web_ui()->RegisterMessageCallback("closeNotificationPromo",
       base::Bind(&NewTabPageHandler::HandleCloseNotificationPromo,
                  base::Unretained(this)));