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

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

Index: chrome/browser/ui/webui/ntp/app_launcher_handler.h
diff --git a/chrome/browser/ui/webui/ntp/app_launcher_handler.h b/chrome/browser/ui/webui/ntp/app_launcher_handler.h
index c68a176ecace1cfc5b772f8c320638ef6c33546c..51fcbccc2e1ee35f7a9b49e1a5ed454c6fda60af 100644
--- a/chrome/browser/ui/webui/ntp/app_launcher_handler.h
+++ b/chrome/browser/ui/webui/ntp/app_launcher_handler.h
@@ -66,6 +66,9 @@ class AppLauncherHandler : public content::WebUIMessageHandler,
   // 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);
 
@@ -121,6 +124,9 @@ class AppLauncherHandler : public content::WebUIMessageHandler,
     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();