Revert 267095 "Remove WebUI NTP on Android."

trunk/src/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_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
@@ skipping 21 matching lines @@
 // The WebUIController used for the New Tab page.
 class NewTabUI : public content::WebUIController,
                  public content::WebContentsObserver,
                  public content::NotificationObserver {
  public:
   explicit NewTabUI(content::WebUI* web_ui);
   virtual ~NewTabUI();
 
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
+  // Returns whether or not this browser process might ever need to show apps
+  // on the NTP.  With Win8 running in immersive mode, for example, apps are
+  // displayed on a ChromeOS-style apps bar and not on the NTP.  In desktop,
+  // however, apps are displayed on the NTP.  Since they both share the same
+  // browser process instance, a different decision is necessary for whether
+  // or not to register app message handlers versus whether to show it on NTP.
+  static bool MightShowApps();
+
   // Returns whether or not to show apps pages.
   static bool ShouldShowApps();
 
   // Returns whether or not "Discovery" in the NTP is Enabled.
   static bool IsDiscoveryInNTPEnabled();
 
   // 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 base::string16& title,
@@ skipping 88 matching lines @@
 
   // If the sync promo NTP bubble is being shown.
   bool showing_sync_bubble_;
 
   PrefChangeRegistrar pref_change_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(NewTabUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_UI_H_