struct UnloadedExtensionInfo -> enum UnloadedExtensionInfoReason

chrome/browser/speech/extension_api/tts_engine_extension_observer.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_SPEECH_EXTENSION_API_TTS_ENGINE_EXTENSION_OBSERVER_H_
 #define CHROME_BROWSER_SPEECH_EXTENSION_API_TTS_ENGINE_EXTENSION_OBSERVER_H_
 
 #include "base/macros.h"
 #include "base/scoped_observer.h"
 #include "components/keyed_service/core/keyed_service.h"
@@ skipping 16 matching lines @@
   // as loaded immediately if |update| is set to true.
   bool SawExtensionLoad(const std::string& extension_id, bool update);
 
   // Implementation of KeyedService.
   void Shutdown() override;
 
   // Implementation of extensions::EventRouter::Observer.
   void OnListenerAdded(const extensions::EventListenerInfo& details) override;
 
   // extensions::ExtensionRegistryObserver overrides.
-  void OnExtensionUnloaded(
-      content::BrowserContext* browser_context,
-      const extensions::Extension* extension,
-      extensions::UnloadedExtensionInfo::Reason reason) override;
+  void OnExtensionUnloaded(content::BrowserContext* browser_context,
+                           const extensions::Extension* extension,
+                           extensions::UnloadedExtensionReason reason) override;
 
  private:
   explicit TtsEngineExtensionObserver(Profile* profile);
   ~TtsEngineExtensionObserver() override;
 
   bool IsLoadedTtsEngine(const std::string& extension_id);
 
   ScopedObserver<extensions::ExtensionRegistry,
                  extensions::ExtensionRegistryObserver>
       extension_registry_observer_;
 
   Profile* profile_;
 
   std::set<std::string> engine_extension_ids_;
 
   friend class TtsEngineExtensionObserverFactory;
 
   DISALLOW_COPY_AND_ASSIGN(TtsEngineExtensionObserver);
 };
 
 #endif  // CHROME_BROWSER_SPEECH_EXTENSION_API_TTS_ENGINE_EXTENSION_OBSERVER_H_