arc: Use v2/auth LSO page.

components/arc/auth/arc_auth_fetcher.h

-// Copyright 2016 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_ARC_AUTH_ARC_AUTH_FETCHER_H_
-#define COMPONENTS_ARC_AUTH_ARC_AUTH_FETCHER_H_
-
-#include <string>
-
-#include "base/macros.h"
-#include "google_apis/gaia/gaia_auth_consumer.h"
-#include "google_apis/gaia/gaia_auth_fetcher.h"
-
-class GURL;
-
-namespace net {
-class URLRequestContextGetter;
-}
-
-namespace arc {
-
-// Fetches ARC auth code. Fetching process starts automatically on creation.
-class ArcAuthFetcher : public GaiaAuthConsumer {
- public:
-  // Returns a result of ARC auth code fetching.
-  class Delegate {
-   public:
-    // Called when code was fetched.
-    virtual void OnAuthCodeFetched(const std::string& code) = 0;
-    // Called when additional UI authorization is required.
-    virtual void OnAuthCodeNeedUI() = 0;
-    // Called when auth code cannot be received.
-    virtual void OnAuthCodeFailed() = 0;
-
-   protected:
-    virtual ~Delegate() = default;
-  };
-
-  ArcAuthFetcher(net::URLRequestContextGetter* getter, Delegate* delegate);
-  ~ArcAuthFetcher() override = default;
-
-  // GaiaAuthConsumer:
-  void OnClientOAuthCode(const std::string& auth_code) override;
-  void OnClientOAuthFailure(const GoogleServiceAuthError& error) override;
-
-  // Helper function to compose target URL for current user, also is used in
-  // test.
-  static GURL CreateURL();
-
- private:
-  void FetchAuthCode();
-
-  // Unowned pointer.
-  Delegate* const delegate_;
-
-  GaiaAuthFetcher auth_fetcher_;
-
-  DISALLOW_COPY_AND_ASSIGN(ArcAuthFetcher);
-};
-
-}  // namespace arc
-
-#endif  // COMPONENTS_ARC_AUTH_ARC_AUTH_FETCHER_H_