Change SigninClient::CreateGaiaAuthFetcher return type to unique_ptr

chrome/browser/signin/chrome_signin_client.h

 // Copyright 2014 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_CHROME_SIGNIN_CLIENT_H_
 #define CHROME_BROWSER_SIGNIN_CHROME_SIGNIN_CLIENT_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "build/build_config.h"
@@ skipping 35 matching lines @@
   net::URLRequestContextGetter* GetURLRequestContext() override;
   bool ShouldMergeSigninCredentialsIntoCookieJar() override;
   bool IsFirstRun() const override;
   base::Time GetInstallDate() override;
   bool AreSigninCookiesAllowed() override;
   void AddContentSettingsObserver(
       content_settings::Observer* observer) override;
   void RemoveContentSettingsObserver(
       content_settings::Observer* observer) override;
   void DelayNetworkCall(const base::Closure& callback) override;
-  GaiaAuthFetcher* CreateGaiaAuthFetcher(
+  std::unique_ptr<GaiaAuthFetcher> CreateGaiaAuthFetcher(
       GaiaAuthConsumer* consumer,
       const std::string& source,
       net::URLRequestContextGetter* getter) override;
 
   // Returns a string describing the chrome version environment. Version format:
   // <Build Info> <OS> <Version number> (<Last change>)<channel or "-devel">
   // If version information is unavailable, returns "invalid."
   std::string GetProductVersion() override;
   std::unique_ptr<CookieChangedSubscription> AddCookieChangedCallback(
       const GURL& url,
@@ skipping 52 matching lines @@
   bool is_force_signin_enabled_;
   bool should_display_user_manager_ = true;
 
   std::unique_ptr<gaia::GaiaOAuthClient> oauth_client_;
   std::unique_ptr<OAuth2TokenService::Request> oauth_request_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeSigninClient);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_CHROME_SIGNIN_CLIENT_H_