[signin] Move Mirror code to ChromeConnectedHeaderHelper

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"  // For OS_IOS
-
 namespace content_settings {
 class CookieSettings;
 }
 
 namespace net {
 class URLRequest;
 }
 
 class GURL;
 
@@ skipping 59 matching lines @@
       const char* header_name,
       const GURL& redirect_url,
       const std::string& account_id,
       const content_settings::CookieSettings* cookie_settings,
       int profile_mode_mask);
 
  protected:
   SigninHeaderHelper() {}
   virtual ~SigninHeaderHelper() {}
 
+  // Dictionary of fields in a account consistency response header.
+  using ResponseHeaderDictionary = std::map<std::string, std::string>;
+
+  // Parses the account consistency response header. Its expected format is
+  // "key1=value1,key2=value2,...".
+  static ResponseHeaderDictionary ParseAccountConsistencyResponseHeader(
+      const std::string& header_value);
+
   // Returns the value of the request header, or empty if the header should not
   // be added. Calls into BuildRequestHeader() which is customized by
   // subclasses.
   std::string BuildRequestHeaderIfPossible(
       bool is_header_request,
       const GURL& url,
       const std::string& account_id,
       const content_settings::CookieSettings* cookie_settings,
       int profile_mode_mask);
 
@@ skipping 29 matching lines @@
     net::URLRequest* request,
     const GURL& redirect_url,
     const std::string& account_id,
     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);
 
-// Returns the parameters contained in the X-Chrome-Manage-Accounts response
-// header.
-// If the request does not have a response header or if the header contains
-// garbage, then |service_type| is set to |GAIA_SERVICE_TYPE_NONE|.
-ManageAccountsParams BuildManageAccountsParamsIfExists(net::URLRequest* request,
-                                                       bool is_off_the_record);
-
 }  // namespace signin
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_SIGNIN_HEADER_HELPER_H_