[Extensions] Remove the prompt to re-enable app when visiting its site

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;
 
 #if defined(OS_CHROMEOS)
 namespace chromeos {
 class DeviceLocalAccountManagementPolicyProvider;
 class SigninScreenPolicyProvider;
 }
 #endif  // defined(OS_CHROMEOS)
 
 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,
@@ skipping 72 matching lines @@
    private:
     Profile* profile_;
 
     // The services that are shared between normal and incognito profiles.
 
     std::unique_ptr<StateStore> state_store_;
     std::unique_ptr<StateStoreNotificationObserver>
         state_store_notification_observer_;
     std::unique_ptr<StateStore> rules_store_;
     scoped_refptr<ValueStoreFactoryImpl> store_factory_;
-    std::unique_ptr<NavigationObserver> navigation_observer_;
     std::unique_ptr<ServiceWorkerManager> service_worker_manager_;
     // Shared memory region manager for scripts statically declared in extension
     // 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_;
@@ skipping 20 matching lines @@
   Profile* profile_;
 
   Shared* shared_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionSystemImpl);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SYSTEM_IMPL_H_