Remove unused code (gaia_oauth_fetcher).

chrome/browser/net/gaia/gaia_oauth_consumer.h

-// Copyright (c) 2011 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_NET_GAIA_GAIA_OAUTH_CONSUMER_H_
-#define CHROME_BROWSER_NET_GAIA_GAIA_OAUTH_CONSUMER_H_
-
-#include <string>
-
-class GoogleServiceAuthError;
-
-// An interface that defines the callbacks for objects to which
-// GaiaOAuthFetcher can return data.
-class GaiaOAuthConsumer {
- public:
-  virtual ~GaiaOAuthConsumer() {}
-
-  virtual void OnGetOAuthTokenSuccess(const std::string& oauth_token) {}
-  virtual void OnGetOAuthTokenFailure(const GoogleServiceAuthError& error) {}
-
-  virtual void OnOAuthGetAccessTokenSuccess(const std::string& token,
-                                            const std::string& secret) {}
-  virtual void OnOAuthGetAccessTokenFailure(
-      const GoogleServiceAuthError& error) {}
-
-  virtual void OnOAuthWrapBridgeSuccess(const std::string& service_scope,
-                                        const std::string& token,
-                                        const std::string& expires_in) {}
-  virtual void OnOAuthWrapBridgeFailure(const std::string& service_scope,
-                                        const GoogleServiceAuthError& error) {}
-
-  virtual void OnUserInfoSuccess(const std::string& email) {}
-  virtual void OnUserInfoFailure(const GoogleServiceAuthError& error) {}
-
-  virtual void OnOAuthLoginSuccess(const std::string& sid,
-                                   const std::string& lsid,
-                                   const std::string& auth) {}
-  virtual void OnOAuthLoginFailure(const GoogleServiceAuthError& error) {}
-
-  virtual void OnOAuthRevokeTokenSuccess() {}
-  virtual void OnOAuthRevokeTokenFailure(const GoogleServiceAuthError& error) {}
-};
-
-#endif  // CHROME_BROWSER_NET_GAIA_GAIA_OAUTH_CONSUMER_H_