[Cleanup] Const-correct the profile() method for the EasyUnlockService

chrome/browser/ui/app_list/test/fake_profile.h

 // Copyright 2013 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_UI_APP_LIST_TEST_FAKE_PROFILE_H_
 #define CHROME_BROWSER_UI_APP_LIST_TEST_FAKE_PROFILE_H_
 
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/sequenced_task_runner.h"
@@ skipping 43 matching lines @@
   scoped_refptr<base::SequencedTaskRunner> GetIOTaskRunner() override;
   Profile* GetOffTheRecordProfile() override;
   void DestroyOffTheRecordProfile() override;
   bool HasOffTheRecordProfile() override;
   Profile* GetOriginalProfile() override;
   bool IsSupervised() override;
   bool IsChild() override;
   bool IsLegacySupervised() override;
   ExtensionSpecialStoragePolicy* GetExtensionSpecialStoragePolicy() override;
   PrefService* GetPrefs() override;
+  const PrefService* GetPrefs() const override;
   PrefService* GetOffTheRecordPrefs() override;
   net::URLRequestContextGetter* GetRequestContext() override;
   net::URLRequestContextGetter* GetRequestContextForExtensions() override;
   net::SSLConfigService* GetSSLConfigService() override;
   HostContentSettingsMap* GetHostContentSettingsMap() override;
   bool IsSameProfile(Profile* profile) override;
   base::Time GetStartTime() const override;
   net::URLRequestContextGetter* CreateRequestContext(
       content::ProtocolHandlerMap* protocol_handlers,
       content::URLRequestInterceptorScopedVector request_interceptors) override;
@@ skipping 21 matching lines @@
   bool WasCreatedByVersionOrLater(const std::string& version) override;
   void SetExitType(ExitType exit_type) override;
   ExitType GetLastSessionExitType() override;
 
  private:
   std::string name_;
   base::FilePath path_;
 };
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_TEST_FAKE_PROFILE_H_