Refactor AO2TS to make it easier to componentize.

components/signin/ios/browser/profile_oauth2_token_service_ios.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 COMPONENTS_SIGNIN_IOS_BROWSER_PROFILE_OAUTH2_TOKEN_SERVICE_IOS_H_
 #define COMPONENTS_SIGNIN_IOS_BROWSER_PROFILE_OAUTH2_TOKEN_SERVICE_IOS_H_
 
 #include <string>
 
 #include "base/threading/thread_checker.h"
@@ skipping 15 matching lines @@
 // Note: Requests should be started from the UI thread. To start a
 // request from aother thread, please use OAuth2TokenServiceRequest.
 class ProfileOAuth2TokenServiceIOS : public ProfileOAuth2TokenService {
  public:
   // KeyedService
   void Shutdown() override;
 
   // OAuth2TokenService
   bool RefreshTokenIsAvailable(const std::string& account_id) const override;
 
-  void InvalidateOAuth2Token(const std::string& account_id,
+  void InvalidateAccessToken(const std::string& account_id,
                              const std::string& client_id,
                              const ScopeSet& scopes,
                              const std::string& access_token) override;
 
   // ProfileOAuth2TokenService
   void Initialize(SigninClient* client,
                   SigninErrorController* signin_error_controller) override;
   void LoadCredentials(const std::string& primary_account_id) override;
   std::vector<std::string> GetAccounts() override;
   void UpdateAuthError(const std::string& account_id,
@@ skipping 107 matching lines @@
 
   // Calls to this class are expected to be made from the browser UI thread.
   // The purpose of this checker is to detect access to
   // ProfileOAuth2TokenService from multiple threads in upstream code.
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileOAuth2TokenServiceIOS);
 };
 
 #endif  // COMPONENTS_SIGNIN_IOS_BROWSER_PROFILE_OAUTH2_TOKEN_SERVICE_IOS_H_