remove ntp app install hint

chrome/browser/ui/webui/ntp/new_tab_ui.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_UI_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 14 matching lines @@
 
 // The WebContents used for the New Tab page.
 class NewTabUI : public content::WebUIController,
                  public content::NotificationObserver {
  public:
   explicit NewTabUI(content::WebUI* web_ui);
   virtual ~NewTabUI();
 
   static void RegisterUserPrefs(PrefService* prefs);
 
-  // Sets up any experiment in which the NTP might want to participate.
-  // The CWS footer link is one such example.
-  static void SetupFieldTrials();
-
-  // Returns whether or not to show the link to the CWS in the footer.
-  static bool ShouldShowWebStoreFooterLink();
-
-  // Returns whether or not to show the app install hint.
-  static bool ShouldShowAppInstallHint();
-
   // Returns whether or not to show apps pages.
   static bool ShouldShowApps();
 
   // Returns whether or not the "suggestions links page" is enabled.
   static bool IsSuggestionsPageEnabled();
 
   // Adds "url", "title", and "direction" keys on incoming dictionary, setting
   // title as the url as a fallback on empty title.
   static void SetURLTitleAndDirection(base::DictionaryValue* dictionary,
                                       const string16& title,
@@ skipping 79 matching lines @@
   static const int current_pref_version_ = 3;
 
   // If the sync promo NTP bubble is being shown.
   bool showing_sync_bubble_;
 
   PrefChangeRegistrar pref_change_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(NewTabUI);
 };
 
-extern const char kWebStoreLinkExperiment[];
-
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_UI_H_