remove ntp app install hint

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

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/webui/ntp/new_tab_page_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/field_trial.h"
@@ skipping 39 matching lines @@
 
   static bool default_apps_trial_exists =
       base::FieldTrialList::TrialExists(kDefaultAppsTrialName);
   if (default_apps_trial_exists) {
     UMA_HISTOGRAM_ENUMERATION(
         base::FieldTrial::MakeName(kDefaultPageTypeHistogram,
                                    kDefaultAppsTrialName),
         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)));
   web_ui()->RegisterMessageCallback("notificationPromoViewed",
       base::Bind(&NewTabPageHandler::HandleNotificationPromoViewed,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("pageSelected",
       base::Bind(&NewTabPageHandler::HandlePageSelected,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("introMessageDismissed",
@@ skipping 118 matching lines @@
   // is only called during startup before the ntp resource cache is constructed.
 }
 
 void NewTabPageHandler::Notify(chrome::NotificationType notification_type) {
   content::NotificationService* service =
       content::NotificationService::current();
   service->Notify(notification_type,
                   content::Source<NewTabPageHandler>(this),
                   content::NotificationService::NoDetails());
 }