Use PreloadCheckGroup in ExtensionInstallChecker. Make RequirementsChecker a PreloadCheck.

extensions/browser/api/management/management_api.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_API_MANAGEMENT_MANAGEMENT_API_H_
 #define EXTENSIONS_BROWSER_API_MANAGEMENT_MANAGEMENT_API_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/scoped_observer.h"
 #include "base/strings/string16.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "extensions/browser/api/management/management_api_delegate.h"
+#include "extensions/browser/preload_check.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/browser/extension_event_histogram_value.h"
 #include "extensions/browser/extension_function.h"
 #include "extensions/browser/extension_registry_observer.h"
 
 struct WebApplicationInfo;
 
 namespace extensions {
 class ExtensionRegistry;
@@ skipping 81 matching lines @@
 
  protected:
   ~ManagementSetEnabledFunction() override;
 
   // ExtensionFunction:
   ResponseAction Run() override;
 
  private:
   void OnInstallPromptDone(bool did_accept);
 
-  void OnRequirementsChecked(const std::vector<std::string>& requirements);
+  void OnRequirementsChecked(PreloadCheck::Errors requirements_errors);
 
   std::string extension_id_;
 
   std::unique_ptr<InstallPromptDelegate> install_prompt_;
 
   std::unique_ptr<RequirementsChecker> requirements_checker_;
 };
 
 class ManagementUninstallFunctionBase : public UIThreadExtensionFunction {
  public:
@@ skipping 151 matching lines @@
   std::unique_ptr<ManagementEventRouter> management_event_router_;
 
   std::unique_ptr<ManagementAPIDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(ManagementAPI);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_MANAGEMENT_MANAGEMENT_API_H_