views: Make SimpleMessageBoxViews::GetDialogButtons() more readable.

chrome/browser/ui/views/js_modal_dialog_views.cc

 // Copyright (c) 2011 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/views/js_modal_dialog_views.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/ui/app_modal_dialogs/app_modal_dialog.h"
 #include "chrome/browser/ui/views/window.h"
 #include "grit/generated_resources.h"
@@ skipping 62 matching lines @@
   if (parent_->dialog_flags() & ui::MessageBoxFlags::kFlagHasOKButton)
     return ui::DIALOG_BUTTON_OK;
 
   if (parent_->dialog_flags() & ui::MessageBoxFlags::kFlagHasCancelButton)
     return ui::DIALOG_BUTTON_CANCEL;
 
   return ui::DIALOG_BUTTON_NONE;
 }
 
 int JSModalDialogViews::GetDialogButtons() const {
-  int dialog_buttons = 0;
+  int dialog_buttons = ui::DIALOG_BUTTON_NONE;
   if (parent_->dialog_flags() & ui::MessageBoxFlags::kFlagHasOKButton)
     dialog_buttons = ui::DIALOG_BUTTON_OK;
 
   if (parent_->dialog_flags() & ui::MessageBoxFlags::kFlagHasCancelButton)
     dialog_buttons |= ui::DIALOG_BUTTON_CANCEL;
 
   return dialog_buttons;
 }
 
 string16 JSModalDialogViews::GetWindowTitle() const {
@@ skipping 68 matching lines @@
 
 // static
 NativeAppModalDialog* NativeAppModalDialog::CreateNativeJavaScriptPrompt(
     JavaScriptAppModalDialog* dialog,
     gfx::NativeWindow parent_window) {
   JSModalDialogViews* d = new JSModalDialogViews(dialog);
 
   browser::CreateViewsWindow(parent_window, d);
   return d;
 }