remove ntp app install hint

chrome/browser/about_flags.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/about_flags.h"
 
 #include <algorithm>
 #include <iterator>
 #include <map>
 #include <set>
@@ skipping 540 matching lines @@
     SINGLE_VALUE_TYPE(switches::kEnableStyleScoped)
   },
   {
     "enable-css-regions",
     IDS_FLAGS_CSS_REGIONS_NAME,
     IDS_FLAGS_CSS_REGIONS_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kEnableCssRegions)
   },
   {
-    "ntp-app-install-hint",
-    IDS_FLAGS_APP_INSTALL_HINT_NAME,
-    IDS_FLAGS_APP_INSTALL_HINT_DESCRIPTION,
-    kOsAll,
-    SINGLE_VALUE_TYPE(switches::kNtpAppInstallHint)
-  },
-  {
     "enable-extension-activity-ui",
     IDS_FLAGS_ENABLE_EXTENSION_ACTIVITY_UI_NAME,
     IDS_FLAGS_ENABLE_EXTENSION_ACTIVITY_UI_DESCRIPTION,
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kEnableExtensionActivityUI)
   },
   {
     "webui-task-manager",
     IDS_FLAGS_WEBUI_TASK_MANAGER_NAME,
     IDS_FLAGS_WEBUI_TASK_MANAGER_DESCRIPTION,
@@ skipping 557 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags