Display local signin error without browser and record the path of selected profile in user manager.

chrome/browser/ui/webui/signin/signin_error_handler.h

 // Copyright 2016 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 CHROME_BROWSER_UI_WEBUI_SIGNIN_SIGNIN_ERROR_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_SIGNIN_SIGNIN_ERROR_HANDLER_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "content/public/browser/web_ui_message_handler.h"
 
 class Browser;
 class ProfileAttributesEntry;
 
 namespace base {
 class ListValue;
 }
 
 class SigninErrorHandler : public content::WebUIMessageHandler {
  public:
-  SigninErrorHandler() {}
+  explicit SigninErrorHandler(bool is_system_profile);
+
   ~SigninErrorHandler() override {}
 
   // content::WebUIMessageHandler:
   void RegisterMessages() override;
 
   // Sets the existing profile entry that has the same username used for signin.
   // This function is called when the signin error is a duplicate account error.
   void set_duplicate_profile_entry(
       const ProfileAttributesEntry* duplicate_profile_entry) {
     duplicate_profile_entry_ = duplicate_profile_entry;
@@ skipping 18 matching lines @@
   // Handles the web ui message sent when the html content is done being laid
   // out and it's time to resize the native view hosting it to fit. |args| is
   // a single integer value for the height the native view should resize to.
   virtual void HandleInitializedWithSize(const base::ListValue* args);
 
   void CloseDialog();
 
  private:
   const ProfileAttributesEntry* duplicate_profile_entry_ = nullptr;
 
+  bool is_system_profile_;
+
   DISALLOW_COPY_AND_ASSIGN(SigninErrorHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SIGNIN_SIGNIN_ERROR_HANDLER_H_