Convert MessageBoxFlags class into an enum.

chrome/browser/ui/app_modal_dialogs/message_box_handler.cc

Index: chrome/browser/ui/app_modal_dialogs/message_box_handler.cc
diff --git a/chrome/browser/ui/app_modal_dialogs/message_box_handler.cc b/chrome/browser/ui/app_modal_dialogs/message_box_handler.cc
index 9dc374a865920d655aa5a567e003ff8f8b0bba00..32271d216ade8fae4ecd517a3bb40e728d2dc365 100644
--- a/chrome/browser/ui/app_modal_dialogs/message_box_handler.cc
+++ b/chrome/browser/ui/app_modal_dialogs/message_box_handler.cc
@@ -7,9 +7,9 @@
 #include <map>
 
 #include "base/compiler_specific.h"
+#include "base/i18n/rtl.h"
 #include "base/memory/singleton.h"
 #include "base/utf_string_conversions.h"
-#include "base/i18n/rtl.h"
 #include "chrome/browser/ui/app_modal_dialogs/app_modal_dialog_queue.h"
 #include "chrome/browser/ui/app_modal_dialogs/js_modal_dialog.h"
 #include "chrome/common/chrome_constants.h"
@@ -101,7 +101,7 @@ void ChromeJavaScriptDialogCreator::RunJavaScriptDialog(
     display_suppress_checkbox = true;
   }
 
-  bool is_alert = dialog_flags == ui::MessageBoxFlags::kIsJavascriptAlert;
+  bool is_alert = dialog_flags == ui::MESSAGE_BOX_IS_JAVASCRIPT_ALERT_DIALOG;
   string16 dialog_title = GetTitle(title_type, title, is_alert);
 
   AppModalDialogQueue::GetInstance()->AddDialog(new JavaScriptAppModalDialog(
@@ -130,7 +130,7 @@ void ChromeJavaScriptDialogCreator::RunBeforeUnloadDialog(
       delegate,
       extra_data,
       l10n_util::GetStringUTF16(IDS_BEFOREUNLOAD_MESSAGEBOX_TITLE),
-      ui::MessageBoxFlags::kIsJavascriptConfirm,
+      ui::MESSAGE_BOX_IS_JAVASCRIPT_CONFIRM_DIALOG,
       full_message,
       string16(),  // default_prompt_text
       false,       // display_suppress_checkbox