MacViews: Unify web contents modal dialog types

chrome/browser/ui/cocoa/modal_dialog_client_cocoa.mm

+// Copyright 2015 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.
+
+#import "chrome/browser/ui/cocoa/modal_dialog_client_cocoa.h"
+
+#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet.h"
+#import "chrome/browser/ui/cocoa/single_web_contents_dialog_manager_cocoa.h"
+#include "components/web_modal/web_contents_modal_dialog_manager.h"
+
+using web_modal::WebContentsModalDialogManager;
+
+ModalDialogClientCocoa::ModalDialogClientCocoa() : manager_(nullptr) {
+}
+
+ModalDialogClientCocoa::~ModalDialogClientCocoa() {
+  DCHECK(!manager_);
+}
+
+void ModalDialogClientCocoa::Show(id<ConstrainedWindowSheet> sheet,
+                                  content::WebContents* web_contents) {
+  auto manager = WebContentsModalDialogManager::FromWebContents(web_contents);
+  scoped_ptr<SingleWebContentsDialogManagerCocoa> native_manager(
+      new SingleWebContentsDialogManagerCocoa(this, sheet, manager));
+  manager->ShowDialogWithManager([sheet sheetWindow], native_manager.Pass());
+}
+
+void ModalDialogClientCocoa::Close() {
+  if (manager_)
+    manager_->Close();
+}