extensions: Abstract out install delay strategy

chrome/browser/extensions/extension_system_impl.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_IMPL_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_IMPL_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/common/one_shot_event.h"
 
 class Profile;
 class ValueStore;
 
 namespace extensions {
 
 class ExtensionSystemSharedFactory;
 class NavigationObserver;
 class StateStoreNotificationObserver;
 class UninstallPingSender;
+class InstallGate;
 class ValueStoreFactory;
 class ValueStoreFactoryImpl;
 
 // The ExtensionSystem for ProfileImpl and OffTheRecordProfileImpl.
 // Implementation details: non-shared services are owned by
 // ExtensionSystemImpl, a KeyedService with separate incognito
 // instances. A private Shared class (also a KeyedService,
 // but with a shared instance for incognito) keeps the common services.
 class ExtensionSystemImpl : public ExtensionSystem {
  public:
@@ skipping 39 matching lines @@
   // shared between normal and incognito profiles.
   class Shared : public KeyedService {
    public:
     explicit Shared(Profile* profile);
     ~Shared() override;
 
     // Initialization takes place in phases.
     virtual void InitPrefs();
     // This must not be called until all the providers have been created.
     void RegisterManagementPolicyProviders();
+    void InitInstallGates();
     void Init(bool extensions_enabled);
 
     // KeyedService implementation.
     void Shutdown() override;
 
     StateStore* state_store();
     StateStore* rules_store();
     scoped_refptr<ValueStoreFactory> store_factory() const;
     ExtensionService* extension_service();
     RuntimeData* runtime_data();
@@ skipping 22 matching lines @@
     // manifests. This region is shared between all extensions.
     std::unique_ptr<SharedUserScriptMaster> shared_user_script_master_;
     std::unique_ptr<RuntimeData> runtime_data_;
     // ExtensionService depends on StateStore, Blacklist and RuntimeData.
     std::unique_ptr<ExtensionService> extension_service_;
     std::unique_ptr<ManagementPolicy> management_policy_;
     // extension_info_map_ needs to outlive process_manager_.
     scoped_refptr<InfoMap> extension_info_map_;
     std::unique_ptr<QuotaService> quota_service_;
     std::unique_ptr<AppSorting> app_sorting_;
+    std::unique_ptr<InstallGate> update_install_gate_;
 
     // For verifying the contents of extensions read from disk.
     scoped_refptr<ContentVerifier> content_verifier_;
 
     std::unique_ptr<UninstallPingSender> uninstall_ping_sender_;
 
 #if defined(OS_CHROMEOS)
     std::unique_ptr<chromeos::DeviceLocalAccountManagementPolicyProvider>
         device_local_account_management_policy_provider_;
 #endif
 
     OneShotEvent ready_;
   };
 
   Profile* profile_;
 
   Shared* shared_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionSystemImpl);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_IMPL_H_