Replace --add-to-shelf flag with kAppBanners feature.

chrome/browser/extensions/extension_util.cc

 // Copyright 2013 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_util.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/feature_list.h"
@@ skipping 280 matching lines @@
       IDR_APP_DEFAULT_ICON);
 }
 
 const gfx::ImageSkia& GetDefaultExtensionIcon() {
   return *ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
       IDR_EXTENSION_DEFAULT_ICON);
 }
 
 bool IsNewBookmarkAppsEnabled() {
 #if defined(OS_MACOSX)
-  return base::FeatureList::IsEnabled(features::kBookmarkApps);
+  return base::FeatureList::IsEnabled(features::kBookmarkApps) ||
+         base::FeatureList::IsEnabled(features::kAppBanners);
 #else
   return true;
 #endif
 }
 
 bool CanHostedAppsOpenInWindows() {
 #if defined(OS_MACOSX)
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableHostedAppsInWindows);
 #else
   return true;
 #endif
 }
 
 bool IsExtensionSupervised(const Extension* extension, Profile* profile) {
   return WasInstalledByCustodian(extension->id(), profile) &&
          profile->IsSupervised();
 }
 
 }  // namespace util
 }  // namespace extensions