Parse extra parameters on x-chrome-manage-accounts header

chrome/browser/signin/signin_header_helper.h

Index: chrome/browser/signin/signin_header_helper.h
diff --git a/chrome/browser/signin/signin_header_helper.h b/chrome/browser/signin/signin_header_helper.h
index b2b7dba6b11831ff422a1b9937fa9853b593f5a2..f5f9d7af9291e8aa145d9175b30399d8fe9d1478 100644
--- a/chrome/browser/signin/signin_header_helper.h
+++ b/chrome/browser/signin/signin_header_helper.h
@@ -41,7 +41,29 @@ enum GAIAServiceType {
 
 // Struct describing the paramters received in the manage account header.
 struct ManageAccountsParams {
+  // The requested service type such as "ADDSESSION".
   GAIAServiceType service_type;
+  // The prefilled email.
+  std::string email;
+  // Whether |email| is a saml account.
+  bool is_saml;
+  // The continue URL after the requested service is completed successfully.
+  // Defaults to the current URL if empty.
+  std::string continue_url;
+  // Whether the continue URL should be loaded in the same tab.
+  bool is_same_tab;
+  // The child id associated with the web content of the request.
+  int child_id;
+  // The route id associated with the web content of the request.
+  int route_id;
+
+  ManageAccountsParams() : service_type(GAIA_SERVICE_TYPE_NONE),
+                           email(""),
+                           is_saml(false),
+                           continue_url(""),
+                           is_same_tab(false),
+                           child_id(0),
+                           route_id(0) {}
 };
 
 // Adds X-Chrome-Connected header to all Gaia requests from a connected profile,