[signin] Move Mirror code to ChromeConnectedHeaderHelper

components/signin/core/browser/chrome_connected_header_helper.h

 // Copyright 2017 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_CHROME_CONNECTED_HEADER_HELPER_H_
 #define COMPONENTS_SIGNIN_CORE_BROWSER_CHROME_CONNECTED_HEADER_HELPER_H_
 
 #include <string>
 
 #include "components/signin/core/browser/signin_header_helper.h"
 
 class GURL;
 
 namespace signin {
 
 // SigninHeaderHelper implementation managing the "X-Chrome-Connected" header.
 class ChromeConnectedHeaderHelper : public SigninHeaderHelper {
  public:
   ChromeConnectedHeaderHelper() {}
   ~ChromeConnectedHeaderHelper() override {}
 
   // Returns the Chrome-Connected cookie, or an empty string if it should not be
   // added to the request to |url|.
   static std::string BuildRequestCookieIfPossible(
       const GURL& 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.
+  static ManageAccountsParams BuildManageAccountsParams(
+      const std::string& header_value);
+
  private:
   // Returns whether the URL is eligible for the Gaia ID parameter.
   bool IsUrlEligibleToIncludeGaiaId(const GURL& url, bool is_header_request);
 
   // Returns whether the URL has a Google Drive origin.
   bool IsDriveOrigin(const GURL& url);
 
   // SigninHeaderHelper implementation:
   bool IsUrlEligibleForRequestHeader(const GURL& url) override;
   std::string BuildRequestHeader(bool is_header_request,
                                  const GURL& url,
                                  const std::string& account_id,
                                  int profile_mode_mask) override;
 };
 
 }  // namespace signin
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_CHROME_CONNECTED_HEADER_HELPER_H_