Don't show the apps page on the NTP if the app launcher is installed.

chrome/browser/ui/webui/ntp/app_launcher_handler.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_APP_LAUNCHER_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_NTP_APP_LAUNCHER_HANDLER_H_
 
 #include <set>
 #include <string>
 
@@ skipping 48 matching lines @@
   void FillAppDictionary(base::DictionaryValue* value);
 
   // Create a dictionary value for the given extension. May return NULL, e.g. if
   // the given extension is not an app. If non-NULL, the caller assumes
   // ownership of the pointer.
   base::DictionaryValue* GetAppInfo(const extensions::Extension* extension);
 
   // Populate the given dictionary with the web store promo content.
   void FillPromoDictionary(base::DictionaryValue* value);
 
+  // Callback for the "getShouldShowApps" message.
+  void HandleGetShouldShowApps(const base::ListValue* args);
+
   // Callback for the "getApps" message.
   void HandleGetApps(const base::ListValue* args);
 
   // Callback for the "launchApp" message.
   void HandleLaunchApp(const base::ListValue* args);
 
   // Callback for the "setLaunchType" message.
   void HandleSetLaunchType(const base::ListValue* args);
 
   // Callback for the "uninstallApp" message.
@@ skipping 35 matching lines @@
   struct AppInstallInfo {
     AppInstallInfo();
     ~AppInstallInfo();
 
     bool is_bookmark_app;
     string16 title;
     GURL app_url;
     syncer::StringOrdinal page_ordinal;
   };
 
+  // Callback for extensions::GetIsAppLauncherEnabled().
+  void GotIsAppLauncherEnabled(bool is_enabled);
+
   // Reset some instance flags we use to track the currently uninstalling app.
   void CleanupAfterUninstall();
 
   // Records a web store launch in the appropriate histograms.
   static void RecordWebStoreLaunch();
 
   // Records an app launch in the corresponding |bucket| of the app launch
   // histogram. |promo_active| specifies if the web store promotion was active.
   static void RecordAppLaunchByID(extension_misc::AppLaunchBucket bucket);
 
@@ skipping 67 matching lines @@
   // when the app is added to the page (via getAppsCallback or appAdded).
   std::string highlight_app_id_;
 
   // Used for favicon loading tasks.
   CancelableTaskTracker cancelable_task_tracker_;
 
   DISALLOW_COPY_AND_ASSIGN(AppLauncherHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_APP_LAUNCHER_HANDLER_H_