Use GN buildflags and features to configure account consistency

components/signin/core/browser/signin_header_helper.h

 // Copyright 2013 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 COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_HEADER_HELPER_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_HEADER_HELPER_H_
 
 #include <map>
 #include <string>
 
-#include "build/build_config.h"
+#include "components/signin/core/common/signin_features.h"
 #include "url/gurl.h"
 
 namespace content_settings {
 class CookieSettings;
 }
 
 namespace net {
 class URLRequest;
 }
 
@@ skipping 126 matching lines @@
     const GURL& redirect_url,
     const std::string& account_id,
     bool sync_enabled,
     const content_settings::CookieSettings* cookie_settings,
     int profile_mode_mask);
 
 // Returns the parameters contained in the X-Chrome-Manage-Accounts response
 // header.
 ManageAccountsParams BuildManageAccountsParams(const std::string& header_value);
 
-#if !defined(OS_IOS) && !defined(OS_ANDROID)
+#if BUILDFLAG(ENABLE_DICE_SUPPORT)
 // Returns the parameters contained in the X-Chrome-ID-Consistency-Response
 // response header.
 // Returns DiceAction::NONE in case of error (such as missing or malformed
 // parameters).
 DiceResponseParams BuildDiceResponseParams(const std::string& header_value);
 #endif
 
 }  // namespace signin
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_HEADER_HELPER_H_