Make a clean interface for dialog callbacks.

chrome/browser/ui/app_modal_dialogs/app_modal_dialog.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/app_modal_dialogs/app_modal_dialog.h"
 
 #include "chrome/browser/ui/app_modal_dialogs/app_modal_dialog_queue.h"
 #include "chrome/browser/ui/app_modal_dialogs/native_app_modal_dialog.h"
+#include "content/browser/javascript_dialogs.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/common/notification_service.h"
 #include "content/common/notification_type.h"
 
-AppModalDialog::AppModalDialog(TabContents* tab_contents,
+AppModalDialog::AppModalDialog(content::DialogDelegate* delegate,
                                const string16& title)
-    : skip_this_dialog_(false),
-      tab_contents_(tab_contents),
+    : valid_(true),
+      delegate_(delegate),
       native_dialog_(NULL),
       title_(title) {
 }
 
 AppModalDialog::~AppModalDialog() {
 }
 
 void AppModalDialog::ShowModalDialog() {
-  if (tab_contents_)
-    tab_contents_->Activate();
+  if (delegate_)
+    delegate_->OnDialogShown();
 
   CreateAndShowDialog();
 
   NotificationService::current()->Notify(
       NotificationType::APP_MODAL_DIALOG_SHOWN,
       Source<AppModalDialog>(this),
       NotificationService::NoDetails());
 }
 
 void AppModalDialog::CreateAndShowDialog() {
   native_dialog_ = CreateNativeDialog();
   native_dialog_->ShowAppModalDialog();
 }
 
 bool AppModalDialog::IsValid() {
-  return !skip_this_dialog_;
+  return valid_;
+}
+
+void AppModalDialog::Invalidate() {
+  valid_ = false;
 }
 
 bool AppModalDialog::IsJavaScriptModalDialog() {
   return false;
 }
 
+content::DialogDelegate* AppModalDialog::delegate() const {
+  return delegate_;
+}
+
 void AppModalDialog::ActivateModalDialog() {
   DCHECK(native_dialog_);
   native_dialog_->ActivateAppModalDialog();
 }
 
 void AppModalDialog::CloseModalDialog() {
   DCHECK(native_dialog_);
   native_dialog_->CloseAppModalDialog();
 }
 
 void AppModalDialog::CompleteDialog() {
   AppModalDialogQueue::GetInstance()->ShowNextDialog();
 }