[Cleanup] Used scoped pointers in KeyedServiceFactory's SetTestingFactory functions.

chrome/browser/signin/fake_gaia_cookie_manager_service.cc

 // Copyright 2015 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.
 
 #include "chrome/browser/signin/fake_gaia_cookie_manager_service.h"
 
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/chrome_signin_client_factory.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
@@ skipping 93 matching lines @@
       base::StringPrintf(
           "[\"f\", [[\"b\", 0, \"n\", \"%s\", \"p\", 0, 0, 0, 0, %d, \"28\"], "
           "[\"b\", 0, \"n\", \"%s\", \"p\", 0, 0, 0, 0, %d, \"29\"]]]",
           account1, account1_expired ? 0 : 1,
           account2, account2_expired ? 0 : 1),
       net::HTTP_OK,
       net::URLRequestStatus::SUCCESS);
 }
 
 // static
-KeyedService* FakeGaiaCookieManagerService::Build(
+scoped_ptr<KeyedService> FakeGaiaCookieManagerService::Build(
     content::BrowserContext* context) {
   Profile* profile = Profile::FromBrowserContext(context);
-  FakeGaiaCookieManagerService* service = new FakeGaiaCookieManagerService(
+  return make_scoped_ptr(new FakeGaiaCookieManagerService(
       ProfileOAuth2TokenServiceFactory::GetForProfile(profile),
       GaiaConstants::kChromeSource,
-      ChromeSigninClientFactory::GetForProfile(profile));
-  return service;
+      ChromeSigninClientFactory::GetForProfile(profile)));
 }