Use PreloadCheckGroup in ExtensionInstallChecker. Make RequirementsChecker a PreloadCheck.

chrome/browser/extensions/api/management/chrome_management_api_delegate.cc

 // Copyright 2014 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/api/management/chrome_management_api_delegate.h"
 
 #include "base/callback_helpers.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/bookmark_app_helper.h"
 #include "chrome/browser/extensions/chrome_extension_function_details.h"
-#include "chrome/browser/extensions/chrome_requirements_checker.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/extensions/launch_util.h"
 #include "chrome/browser/favicon/favicon_service_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/extensions/app_launch_params.h"
 #include "chrome/browser/ui/extensions/application_launch.h"
 #include "chrome/browser/ui/webui/extensions/extension_icon_source.h"
 #include "chrome/common/extensions/chrome_utility_extensions_messages.h"
 #include "chrome/common/extensions/extension_metrics.h"
 #include "chrome/common/extensions/manifest_handlers/app_launch_info.h"
 #include "chrome/common/web_application_info.h"
 #include "components/favicon/core/favicon_service.h"
 #include "components/safe_json/safe_json_parser.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/utility_process_host.h"
 #include "content/public/browser/utility_process_host_client.h"
 #include "content/public/browser/web_contents.h"
 #include "extensions/browser/api/management/management_api.h"
 #include "extensions/browser/api/management/management_api_constants.h"
 #include "extensions/browser/extension_prefs.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_system.h"
+#include "extensions/browser/requirements_checker.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
 
 namespace {
 
 class ManagementSetEnabledFunctionInstallPromptDelegate
     : public extensions::InstallPromptDelegate {
  public:
   ManagementSetEnabledFunctionInstallPromptDelegate(
       content::WebContents* web_contents,
@@ skipping 168 matching lines @@
 ChromeManagementAPIDelegate::SetEnabledFunctionDelegate(
     content::WebContents* web_contents,
     content::BrowserContext* browser_context,
     const extensions::Extension* extension,
     const base::Callback<void(bool)>& callback) const {
   return std::unique_ptr<ManagementSetEnabledFunctionInstallPromptDelegate>(
       new ManagementSetEnabledFunctionInstallPromptDelegate(
           web_contents, browser_context, extension, callback));
 }
 
-std::unique_ptr<extensions::RequirementsChecker>
-ChromeManagementAPIDelegate::CreateRequirementsChecker() const {
-  return base::MakeUnique<extensions::ChromeRequirementsChecker>();
-}
-
 std::unique_ptr<extensions::UninstallDialogDelegate>
 ChromeManagementAPIDelegate::UninstallFunctionDelegate(
     extensions::ManagementUninstallFunctionBase* function,
     const extensions::Extension* target_extension,
     bool show_programmatic_uninstall_ui) const {
   return std::unique_ptr<extensions::UninstallDialogDelegate>(
       new ManagementUninstallFunctionUninstallDialogDelegate(
           function, target_extension, show_programmatic_uninstall_ui));
 }
 
@@ skipping 92 matching lines @@
 }
 
 GURL ChromeManagementAPIDelegate::GetIconURL(
     const extensions::Extension* extension,
     int icon_size,
     ExtensionIconSet::MatchType match,
     bool grayscale) const {
   return extensions::ExtensionIconSource::GetIconURL(extension, icon_size,
                                                      match, grayscale);
 }