Refactor AO2TS to make it easier to componentize.

google_apis/gaia/fake_oauth2_token_service_delegate.h

+// Copyright 2015 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_FAKE_OAUTH2_TOKEN_SERVICE_DELEGATE_H_
+#define CHROME_BROWSER_SIGNIN_FAKE_OAUTH2_TOKEN_SERVICE_DELEGATE_H_
+
+#include "google_apis/gaia/oauth2_token_service_delegate.h"
+#include "net/url_request/url_request_context_getter.h"
+
+class FakeOAuth2TokenServiceDelegate : public OAuth2TokenServiceDelegate {
+ public:
+  FakeOAuth2TokenServiceDelegate(net::URLRequestContextGetter* request_context);
+  ~FakeOAuth2TokenServiceDelegate() override;
+
+  OAuth2AccessTokenFetcher* CreateAccessTokenFetcher(
+      const std::string& account_id,
+      net::URLRequestContextGetter* getter,
+      OAuth2AccessTokenConsumer* consumer) override;
+
+  // Overriden to make sure it works on Android.
+  bool RefreshTokenIsAvailable(const std::string& account_id) const override;
+
+  std::vector<std::string> GetAccounts() override;
+  void RevokeAllCredentials() override;
+
+  void LoadCredentials(const std::string& primary_account_id) override;
+
+  void UpdateCredentials(const std::string& account_id,
+                         const std::string& refresh_token) override;
+  void RevokeCredentials(const std::string& account_id) override;
+
+  net::URLRequestContextGetter* GetRequestContext() const override;
+
+  void set_request_context(net::URLRequestContextGetter* request_context) {
+    request_context_ = request_context;
+  }
+
+ private:
+  void IssueRefreshTokenForUser(const std::string& account_id,
+                                const std::string& token);
+  std::string GetRefreshToken(const std::string& account_id) const;
+
+  // Maps account ids to their refresh token strings.
+  std::map<std::string, std::string> refresh_tokens_;
+
+  scoped_refptr<net::URLRequestContextGetter> request_context_;
+
+  DISALLOW_COPY_AND_ASSIGN(FakeOAuth2TokenServiceDelegate);
+};
+#endif