Move UbertokenFetcher from //chrome to //google_apis.

chrome/browser/signin/ubertoken_fetcher.h

-// Copyright (c) 2012 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_UBERTOKEN_FETCHER_H_
-#define CHROME_BROWSER_SIGNIN_UBERTOKEN_FETCHER_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "google_apis/gaia/gaia_auth_consumer.h"
-#include "google_apis/gaia/oauth2_token_service.h"
-
-// Allow to retrieves an uber-auth token for the user. This class uses the
-// |OAuth2TokenService| and considers that the user is already logged in. It
-// will use the OAuth2 access token to generate the uber-auth token.
-//
-// This class should be used on a single thread, but it can be whichever thread
-// that you like.
-//
-// This class can handle one request at a time.
-
-class GaiaAuthFetcher;
-class GoogleServiceAuthError;
-class Profile;
-
-// Callback for the |UbertokenFetcher| class.
-class UbertokenConsumer {
- public:
-  UbertokenConsumer() {}
-  virtual ~UbertokenConsumer() {}
-  virtual void OnUbertokenSuccess(const std::string& token) {}
-  virtual void OnUbertokenFailure(const GoogleServiceAuthError& error) {}
-};
-
-// Allows to retrieve an uber-auth token.
-class UbertokenFetcher : public GaiaAuthConsumer,
-                         public OAuth2TokenService::Consumer {
- public:
-  UbertokenFetcher(Profile* profile, UbertokenConsumer* consumer);
-  virtual ~UbertokenFetcher();
-
-  // Start fetching the token for |account_id|.
-  virtual void StartFetchingToken(const std::string& account_id);
-
-  // Overriden from GaiaAuthConsumer
-  virtual void OnUberAuthTokenSuccess(const std::string& token) OVERRIDE;
-  virtual void OnUberAuthTokenFailure(
-      const GoogleServiceAuthError& error) OVERRIDE;
-
-  // Overriden from OAuth2TokenService::Consumer:
-  virtual void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
-                                 const std::string& access_token,
-                                 const base::Time& expiration_time) OVERRIDE;
-  virtual void OnGetTokenFailure(const OAuth2TokenService::Request* request,
-                                 const GoogleServiceAuthError& error) OVERRIDE;
-
- private:
-  Profile* profile_;
-  UbertokenConsumer* consumer_;
-  scoped_ptr<GaiaAuthFetcher> gaia_auth_fetcher_;
-  scoped_ptr<OAuth2TokenService::Request> access_token_request_;
-
-  DISALLOW_COPY_AND_ASSIGN(UbertokenFetcher);
-};
-
-#endif  // CHROME_BROWSER_SIGNIN_UBERTOKEN_FETCHER_H_