Fix HandleJavaScriptDialog.

chrome/browser/ui/javascript_dialogs/javascript_dialog_views.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/javascript_dialogs/javascript_dialog_views.h"
 
 #include "base/memory/ptr_util.h"
 #include "components/constrained_window/constrained_window_views.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/views/controls/message_box_view.h"
@@ skipping 16 matching lines @@
                                     title, dialog_type, message_text,
                                     default_prompt_text, dialog_callback))
       ->weak_factory_.GetWeakPtr();
 }
 
 void JavaScriptDialogViews::CloseDialogWithoutCallback() {
   dialog_callback_.Reset();
   GetWidget()->Close();
 }
 
+base::string16 JavaScriptDialogViews::GetUserInput() {
+  return message_box_view_->GetInputText();
+}
+
 int JavaScriptDialogViews::GetDefaultDialogButton() const {
   return ui::DIALOG_BUTTON_OK;
 }
 
 int JavaScriptDialogViews::GetDialogButtons() const {
   const bool is_alert = dialog_type_ == content::JAVASCRIPT_DIALOG_TYPE_ALERT;
   return ui::DIALOG_BUTTON_OK | (is_alert ? 0 : ui::DIALOG_BUTTON_CANCEL);
 }
 
 base::string16 JavaScriptDialogViews::GetWindowTitle() const {
@@ skipping 64 matching lines @@
     options |= views::MessageBoxView::HAS_PROMPT_FIELD;
 
   views::MessageBoxView::InitParams params(message_text);
   params.options = options;
   params.default_prompt = default_prompt_text;
   message_box_view_ = new views::MessageBoxView(params);
   DCHECK(message_box_view_);
 
   constrained_window::ShowWebModalDialogViews(this, parent_web_contents);
 }