Refactor CryptAuth component to be more testable.

components/proximity_auth/cryptauth/cryptauth_access_token_fetcher_impl.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_PROXIMITY_AUTH_CRYPT_AUTH_ACCOUNT_TOKEN_FETCHER_IMPL_H
-#define COMPONENTS_PROXIMITY_AUTH_CRYPT_AUTH_ACCOUNT_TOKEN_FETCHER_IMPL_H
+#ifndef COMPONENTS_PROXIMITY_AUTH_CRYPTAUTH_ACCESS_TOKEN_FETCHER_IMPL_H
+#define COMPONENTS_PROXIMITY_AUTH_CRYPTAUTH_ACCESS_TOKEN_FETCHER_IMPL_H
 
 #include "base/callback.h"
 #include "components/proximity_auth/cryptauth/cryptauth_access_token_fetcher.h"
 #include "google_apis/gaia/oauth2_token_service.h"
 
 namespace proximity_auth {
 
 // Implementation of CryptAuthAccessTokenFetcher fetching an access token for a
 // given account using the provided OAuth2TokenService.
-class CryptAuthAccountTokenFetcher : public CryptAuthAccessTokenFetcher,
-                                     public OAuth2TokenService::Consumer {
+class CryptAuthAccessTokenFetcherImpl : public CryptAuthAccessTokenFetcher,
+                                        public OAuth2TokenService::Consumer {
  public:
   // |token_service| is not owned, and must outlive this object.
-  CryptAuthAccountTokenFetcher(OAuth2TokenService* token_service,
-                               const std::string& account_id);
-  ~CryptAuthAccountTokenFetcher() override;
+  CryptAuthAccessTokenFetcherImpl(OAuth2TokenService* token_service,
+                                  const std::string& account_id);
+  ~CryptAuthAccessTokenFetcherImpl() override;
 
   // CryptAuthAccessTokenFetcher:
   void FetchAccessToken(const AccessTokenCallback& callback) override;
 
  private:
   // OAuth2TokenService::Consumer:
   void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
                          const std::string& access_token,
                          const base::Time& expiration_time) override;
   void OnGetTokenFailure(const OAuth2TokenService::Request* request,
                          const GoogleServiceAuthError& error) override;
 
   // System service that caches and fetches tokens for a given account.
   // Not owned.
   OAuth2TokenService* token_service_;
 
   // The account id for whom to mint the token.
   std::string account_id_;
 
   // True if FetchAccessToken() has been called.
   bool fetch_started_;
 
   // Stores the request from |token_service_| to mint the token.
   scoped_ptr<OAuth2TokenService::Request> token_request_;
 
   // Callback to invoke when the token fetch succeeds or fails.
   AccessTokenCallback callback_;
 
-  DISALLOW_COPY_AND_ASSIGN(CryptAuthAccountTokenFetcher);
+  DISALLOW_COPY_AND_ASSIGN(CryptAuthAccessTokenFetcherImpl);
 };
 
 }  // namespace proximity_auth
 
-#endif  // COMPONENTS_PROXIMITY_AUTH_CRYPT_AUTH_ACCESS_TOKEN_FETCHER_IMPL_H
+#endif  // COMPONENTS_PROXIMITY_AUTH_CRYPTAUTH_ACCESS_TOKEN_FETCHER_IMPL_H