Don't use NTP for app install if NTP does not show apps page.

chrome/browser/extensions/extension_install_ui.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/extensions/extension_install_ui.h"
 
 #include <map>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
@@ skipping 10 matching lines @@
 #include "chrome/browser/simple_message_box.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/themes/theme_service.h"
 #include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_navigator.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
+#include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_icon_set.h"
 #include "chrome/common/extensions/extension_resource.h"
 #include "chrome/common/extensions/url_pattern.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/notification_service.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
@@ skipping 250 matching lines @@
   browser->window()->Show();
 
   bool use_bubble_for_apps = false;
 
 #if defined(TOOLKIT_VIEWS)
   CommandLine* cmdline = CommandLine::ForCurrentProcess();
   use_bubble_for_apps = (use_app_installed_bubble_ ||
                          cmdline->HasSwitch(switches::kAppsNewInstallBubble));
 #endif
 
-  if (extension->is_app() && !use_bubble_for_apps) {
+  if (extension->is_app() &&
+      !use_bubble_for_apps &&
+      NewTabUI::ShouldShowAppsPage()) {
     ExtensionInstallUI::OpenAppInstalledNTP(browser, extension->id());
     return;
   }
 
   browser::ShowExtensionInstalledBubble(extension, browser, icon_, profile);
 }
 
 namespace {
 
 bool disable_failure_ui_for_tests = false;
@@ skipping 129 matching lines @@
     bool previous_using_native_theme) {
   Profile* profile = tab_contents->profile();
   return new ThemeInstalledInfoBarDelegate(
       tab_contents->infobar_tab_helper(),
       profile->GetExtensionService(),
       ThemeServiceFactory::GetForProfile(profile),
       new_theme,
       previous_theme_id,
       previous_using_native_theme);
 }