If force-sign-in policy is enabled, popup warning dialog before window closing if auth token becom…

chrome/browser/ui/views/browser_modal_dialog.cc

Index: chrome/browser/ui/views/browser_modal_dialog.cc
diff --git a/chrome/browser/ui/views/browser_modal_dialog.cc b/chrome/browser/ui/views/browser_modal_dialog.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0c952a03bb119cf1e2a29a8e9286b395ff7ce42e
--- /dev/null
+++ b/chrome/browser/ui/views/browser_modal_dialog.cc
@@ -0,0 +1,64 @@
+// Copyright 2017 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/browser_modal_dialog.h"
+
+#include <algorithm>
+
+#include "base/memory/singleton.h"
+#include "chrome/browser/ui/browser_finder.h"
+#include "chrome/browser/ui/views/app_modal_dialog_queue_wrapper.h"
+
+// BrowserModalDialog
+
+BrowserModalDialog::BrowserModalDialog() : BrowserModalDialog(true) {}
+
+BrowserModalDialog::BrowserModalDialog(bool with_list) {
+  if (with_list)
+    BrowserModalDialogList::GetInstance()->AddDialog(this);
+}
+
+BrowserModalDialog::~BrowserModalDialog() {
+  BrowserModalDialogList::GetInstance()->RemoveDialog(this);
+}
+
+// BrowserModalDialogList
+
+BrowserModalDialogList::BrowserModalDialogList()
+    : wrapper_(base::MakeUnique<AppModalDialogQueueWrapper>()) {}
+
+BrowserModalDialogList::~BrowserModalDialogList() {}
+
+// static
+BrowserModalDialogList* BrowserModalDialogList::GetInstance() {
+  return base::Singleton<BrowserModalDialogList>::get();
+}
+
+void BrowserModalDialogList::AddDialog(BrowserModalDialog* dialog) {
+  dialogs_.push_back(dialog);
+}
+
+void BrowserModalDialogList::RemoveDialog(BrowserModalDialog* dialog) {
+  auto it = std::find(dialogs_.begin(), dialogs_.end(), dialog);
+  if (it != dialogs_.end())
+    dialogs_.erase(it);
+}
+
+void BrowserModalDialogList::ActivateModalDialog(Browser* browser) {
+  for (BrowserModalDialog* dialog : dialogs_) {
+    if (dialog->IsShowing()) {
+      dialog->ActivateModalDialog(browser);
+      return;
+    }
+  }
+  wrapper_->ActivateModalDialog(browser);
+}
+
+bool BrowserModalDialogList::IsShowing() {
+  for (BrowserModalDialog* dialog : dialogs_) {
+    if (dialog->IsShowing())
+      return true;
+  }
+  return wrapper_->IsShowing();
+}