chrome: Cleanup class/struct forward declarations

chrome/browser/signin/easy_unlock_service_factory.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_SIGNIN_EASY_UNLOCK_SERVICE_FACTORY_H_
 #define CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SERVICE_FACTORY_H_
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
 
 namespace content {
 class BrowserContext;
 }
 
 namespace base {
 template <typename T> struct DefaultSingletonTraits;
 }
 
 class EasyUnlockService;
-class Profile;
 
 // Singleton factory that builds and owns all EasyUnlockService.
 class EasyUnlockServiceFactory : public BrowserContextKeyedServiceFactory {
  public:
   static EasyUnlockServiceFactory* GetInstance();
 
   static EasyUnlockService* GetForBrowserContext(
       content::BrowserContext* browser_context);
 
   void set_app_path_for_testing(const base::FilePath& app_path) {
@@ skipping 13 matching lines @@
       content::BrowserContext* context) const override;
   bool ServiceIsCreatedWithBrowserContext() const override;
   bool ServiceIsNULLWhileTesting() const override;
 
   base::FilePath app_path_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(EasyUnlockServiceFactory);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_EASY_UNLOCK_SERVICE_FACTORY_H_