Change X-Auto-Login implementation to use OAuth token.

chrome/browser/signin/ubertoken_fetcher.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.

[Roger Tawa OOO till Jul 10th, 2012/01/31 21:38:23]

should this file live in chrome/common/net/gaia/?

[qsr, 2012/02/01 14:59:18]

 This file depends on TokenService so it cannot live there. If I move it there,
then I need to pass a refresh token to it, which will make the work of all users
more complicated, because getting such a token can only be done reliably by
1) checking if one is already registered on the token service
2) if this is not the case, one must listen to the token service and asks him to
start fetching tokens.

 That makes it a lot harder to use this.

[Roger Tawa OOO till Jul 10th, 2012/02/01 15:29:55]

OK, makes sense.

+// 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_
+#pragma once
+
+#include "base/memory/scoped_ptr.h"
+#include "chrome/common/net/gaia/gaia_oauth_client.h"
+#include "content/public/browser/notification_details.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/notification_source.h"
+#include "content/public/common/url_fetcher.h"
+#include "content/public/common/url_fetcher_delegate.h"
+
+// Allow to retrieves an über-auth token for the user. This class uses the

[Roger Tawa OOO till Jul 10th, 2012/01/31 21:38:23]

Do we allow ü in source code?

[qsr, 2012/02/01 14:59:18]

 Changed to u, just in case.

+// |TokenService| and considers that the user is already logged in. It will then
+// retrieve the OAuth2 refresh token, use it to generate an OAuth2 access token
+// and finally use this access token to generate the über-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 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 über-auth token.
+class UbertokenFetcher : public content::NotificationObserver,
+                         public gaia::GaiaOAuthClient::Delegate,
+                         public content::URLFetcherDelegate {
+ public:
+  UbertokenFetcher(Profile* profile,
+                   UbertokenConsumer* consumer);

[Roger Tawa OOO till Jul 10th, 2012/01/31 21:38:23]

put on one line

[qsr, 2012/02/01 14:59:18]

Done.

+  virtual ~UbertokenFetcher();
+
+  // Start fetching the token.
+  void StartFetchingToken();
+
+  // Overriden from gaia::GaiaOAuthClient::Delegate:
+  virtual void OnGetTokensResponse(const std::string& refresh_token,
+                                   const std::string& access_token,
+                                   int expires_in_seconds) OVERRIDE;
+  virtual void OnRefreshTokenResponse(const std::string& access_token,
+                                      int expires_in_seconds) OVERRIDE;
+  virtual void OnOAuthError() OVERRIDE;
+  virtual void OnNetworkError(int response_code) OVERRIDE;
+
+
+  // Overriden from content::NotificationObserver:
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+  // Overriden from content::URLFetcherDelegate:
+  virtual void OnURLFetchComplete(const content::URLFetcher* source) OVERRIDE;
+
+ private:
+  void StartFetchingUbertoken();
+
+  Profile* profile_;
+  UbertokenConsumer* consumer_;
+  content::NotificationRegistrar registrar_;
+  scoped_ptr<gaia::GaiaOAuthClient> gaia_oauth_client_;
+  scoped_ptr<content::URLFetcher> url_fetcher_;
+
+  DISALLOW_COPY_AND_ASSIGN(UbertokenFetcher);
+};
+
+#endif  // CHROME_BROWSER_SIGNIN_UBERTOKEN_FETCHER_H_