[Signin Error Dialog] (2/3) Added handlers and UI constructors

chrome/browser/ui/signin_view_controller_delegate.cc

 // 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.
 
 #include "chrome/browser/ui/signin_view_controller_delegate.h"
 
 #include "base/bind.h"
 #include "base/values.h"
 #include "chrome/browser/ui/signin_view_controller.h"
-#include "chrome/browser/ui/webui/signin/get_auth_frame.h"
+#include "chrome/browser/ui/webui/signin/signin_utils.h"
 #include "content/public/browser/web_contents.h"
 
 namespace {
 
 content::WebContents* GetAuthFrameWebContents(
     content::WebContents* web_ui_web_contents) {
   return signin::GetAuthFrameWebContents(web_ui_web_contents, "signin-frame");
 }
 
 }  // namespace
@@ skipping 43 matching lines @@
   else
     source->GetWebUI()->CallJavascriptFunctionUnsafe(
         "inline.login.showCloseButton");
 }
 
 bool SigninViewControllerDelegate::CanGoBack(
     content::WebContents* web_ui_web_contents) const {
   auto* auth_web_contents = GetAuthFrameWebContents(web_ui_web_contents);
   return auth_web_contents && auth_web_contents->GetController().CanGoBack();
 }