Dismiss action in tab modal dialogs.

ui/views/window/dialog_delegate.cc

 // Copyright (c) 2012 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 "ui/views/window/dialog_delegate.h"
 
 #include "base/logging.h"
 #include "grit/ui_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/ui_base_switches_util.h"
@@ skipping 65 matching lines @@
 }
 
 bool DialogDelegate::Accept(bool window_closing) {
   return Accept();
 }
 
 bool DialogDelegate::Accept() {
   return true;
 }
 
+bool DialogDelegate::Dismiss() {
+  int buttons = GetDialogButtons();
+  if ((buttons & ui::DIALOG_BUTTON_CANCEL) ||
+      (buttons == ui::DIALOG_BUTTON_NONE)) {
+    return Cancel();
+  }
+  return Accept(true);
+}
+
 base::string16 DialogDelegate::GetDialogLabel() const {
   return base::string16();
 }
 
 base::string16 DialogDelegate::GetDialogTitle() const {
   return base::string16();
 }
 
 int DialogDelegate::GetDialogButtons() const {
   return ui::DIALOG_BUTTON_OK | ui::DIALOG_BUTTON_CANCEL;
@@ skipping 136 matching lines @@
 
 const Widget* DialogDelegateView::GetWidget() const {
   return View::GetWidget();
 }
 
 View* DialogDelegateView::GetContentsView() {
   return this;
 }
 
 }  // namespace views