Refactor AO2TS to make it easier to componentize.

components/signin/core/browser/mutable_profile_oauth2_token_service.h

Index: components/signin/core/browser/mutable_profile_oauth2_token_service.h
diff --git a/components/signin/core/browser/mutable_profile_oauth2_token_service.h b/components/signin/core/browser/mutable_profile_oauth2_token_service.h
deleted file mode 100644
index 611a716dc2d827886d574f425d638fce9e13d472..0000000000000000000000000000000000000000
--- a/components/signin/core/browser/mutable_profile_oauth2_token_service.h
+++ /dev/null
@@ -1,160 +0,0 @@
-// 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_CORE_BROWSER_MUTABLE_PROFILE_OAUTH2_TOKEN_SERVICE_H_
-#define COMPONENTS_SIGNIN_CORE_BROWSER_MUTABLE_PROFILE_OAUTH2_TOKEN_SERVICE_H_
-
-#include "base/memory/scoped_vector.h"
-#include "base/threading/thread_checker.h"
-#include "components/signin/core/browser/profile_oauth2_token_service.h"
-#include "components/signin/core/browser/signin_error_controller.h"
-#include "components/webdata/common/web_data_service_base.h"
-#include "components/webdata/common/web_data_service_consumer.h"
-#include "net/base/backoff_entry.h"
-
-// A specialization of ProfileOAuth2TokenService that can can mutate its OAuth2
-// tokens.
-//
-// Note: This class is just a placeholder for now. Methods used to mutate
-// the tokens are currently being migrated from ProfileOAuth2TokenService.
-class MutableProfileOAuth2TokenService : public ProfileOAuth2TokenService,
-                                         public WebDataServiceConsumer  {
- public:
-  // ProfileOAuth2TokenService overrides.
-  void Shutdown() override;
-  std::vector<std::string> GetAccounts() override;
-
-  // The below three methods should be called only on the thread on which this
-  // object was created.
-  void LoadCredentials(const std::string& primary_account_id) override;
-  void UpdateCredentials(const std::string& account_id,
-                         const std::string& refresh_token) override;
-  void RevokeAllCredentials() override;
-  bool RefreshTokenIsAvailable(const std::string& account_id) const override;
-
-  // Revokes credentials related to |account_id|.
-  void RevokeCredentials(const std::string& account_id);
-
- protected:
-  class AccountInfo : public SigninErrorController::AuthStatusProvider {
-   public:
-    AccountInfo(SigninErrorController* signin_error_controller,
-                const std::string& account_id,
-                const std::string& refresh_token);
-    ~AccountInfo() override;
-
-    const std::string& refresh_token() const { return refresh_token_; }
-    void set_refresh_token(const std::string& token) {
-      refresh_token_ = token;
-    }
-
-    void SetLastAuthError(const GoogleServiceAuthError& error);
-
-    // SigninErrorController::AuthStatusProvider implementation.
-    std::string GetAccountId() const override;
-    GoogleServiceAuthError GetAuthStatus() const override;
-
-   private:
-    SigninErrorController* signin_error_controller_;
-    std::string account_id_;
-    std::string refresh_token_;
-    GoogleServiceAuthError last_auth_error_;
-
-    DISALLOW_COPY_AND_ASSIGN(AccountInfo);
-  };
-
-  // Maps the |account_id| of accounts known to ProfileOAuth2TokenService
-  // to information about the account.
-  typedef std::map<std::string, linked_ptr<AccountInfo> > AccountInfoMap;
-
-  friend class ProfileOAuth2TokenServiceFactory;
-  friend class MutableProfileOAuth2TokenServiceTest;
-
-  MutableProfileOAuth2TokenService();
-  ~MutableProfileOAuth2TokenService() override;
-
-  // OAuth2TokenService implementation.
-  OAuth2AccessTokenFetcher* CreateAccessTokenFetcher(
-      const std::string& account_id,
-      net::URLRequestContextGetter* getter,
-      OAuth2AccessTokenConsumer* consumer) override;
-  net::URLRequestContextGetter* GetRequestContext() override;
-
-  // Updates the internal cache of the result from the most-recently-completed
-  // auth request (used for reporting errors to the user).
-  void UpdateAuthError(const std::string& account_id,
-                       const GoogleServiceAuthError& error) override;
-
-  virtual std::string GetRefreshToken(const std::string& account_id) const;
-
-  bool HasPersistentError(const std::string& account_id);
-
-  AccountInfoMap& refresh_tokens() { return refresh_tokens_; }
-
- private:
-  class RevokeServerRefreshToken;
-
-  FRIEND_TEST_ALL_PREFIXES(MutableProfileOAuth2TokenServiceTest,
-                           TokenServiceUpdateClearsCache);
-  FRIEND_TEST_ALL_PREFIXES(MutableProfileOAuth2TokenServiceTest,
-                           PersistenceDBUpgrade);
-  FRIEND_TEST_ALL_PREFIXES(MutableProfileOAuth2TokenServiceTest,
-                           PersistenceLoadCredentials);
-  FRIEND_TEST_ALL_PREFIXES(MutableProfileOAuth2TokenServiceTest,
-                           CanonicalizeAccountId);
-  FRIEND_TEST_ALL_PREFIXES(MutableProfileOAuth2TokenServiceTest,
-                           FetchPersistentError);
-  FRIEND_TEST_ALL_PREFIXES(MutableProfileOAuth2TokenServiceTest,
-                           RetryBackoff);
-  FRIEND_TEST_ALL_PREFIXES(MutableProfileOAuth2TokenServiceTest,
-                           CanonAndNonCanonAccountId);
-
-  // WebDataServiceConsumer implementation:
-  void OnWebDataServiceRequestDone(WebDataServiceBase::Handle handle,
-                                   const WDTypedResult* result) override;
-
-  // Loads credentials into in memory stucture.
-  void LoadAllCredentialsIntoMemory(
-      const std::map<std::string, std::string>& db_tokens);
-
-  // Persists credentials for |account_id|. Enables overriding for
-  // testing purposes, or other cases, when accessing the DB is not desired.
-  void PersistCredentials(const std::string& account_id,
-                          const std::string& refresh_token);
-
-  // Clears credentials persisted for |account_id|. Enables overriding for
-  // testing purposes, or other cases, when accessing the DB is not desired.
-  void ClearPersistedCredentials(const std::string& account_id);
-
-  // Revokes the refresh token on the server.
-  void RevokeCredentialsOnServer(const std::string& refresh_token);
-
-  // Cancels any outstanding fetch for tokens from the web database.
-  void CancelWebTokenFetch();
-
-  // In memory refresh token store mapping account_id to refresh_token.
-  AccountInfoMap refresh_tokens_;
-
-  // Handle to the request reading tokens from database.
-  WebDataServiceBase::Handle web_data_service_request_;
-
-  // The primary account id of this service's profile during the loading of
-  // credentials.  This member is empty otherwise.
-  std::string loading_primary_account_id_;
-
-  ScopedVector<RevokeServerRefreshToken> server_revokes_;
-
-  // Used to verify that certain methods are called only on the thread on which
-  // this instance was created.
-  base::ThreadChecker thread_checker_;
-
-  // Used to rate-limit network token requests so as to not overload the server.
-  net::BackoffEntry::Policy backoff_policy_;
-  net::BackoffEntry backoff_entry_;
-  GoogleServiceAuthError backoff_error_;
-
-  DISALLOW_COPY_AND_ASSIGN(MutableProfileOAuth2TokenService);
-};
-
-#endif  // COMPONENTS_SIGNIN_CORE_BROWSER_MUTABLE_PROFILE_OAUTH2_TOKEN_SERVICE_H_