Implements the dialog view for logout button tray in public sessions.

ash/system/logout_button/logout_confirmation_dialog_view.cc

Index: ash/system/logout_button/logout_confirmation_dialog_view.cc
diff --git a/ash/system/logout_button/logout_confirmation_dialog_view.cc b/ash/system/logout_button/logout_confirmation_dialog_view.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6c22e66680222c0a2d4197acba613052611d47f8
--- /dev/null
+++ b/ash/system/logout_button/logout_confirmation_dialog_view.cc
@@ -0,0 +1,107 @@
+// Copyright (c) 2013 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 "ash/system/logout_button/logout_confirmation_dialog_view.h"
+
+#include "ash/shell.h"
+#include "ash/system/logout_button/logout_button_tray.h"
+#include "ash/system/tray/system_tray_delegate.h"
+#include "ash/system/tray/tray_constants.h"
+#include "base/location.h"
+#include "grit/ash_strings.h"
+#include "grit/ui_strings.h"
+#include "ui/aura/root_window.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/l10n/time_format.h"
+#include "ui/base/ui_base_types.h"
+#include "ui/gfx/text_constants.h"
+#include "ui/views/controls/label.h"
+#include "ui/views/layout/fill_layout.h"
+#include "ui/views/layout/layout_constants.h"
+#include "ui/views/widget/widget.h"
+
+namespace {
+
+const int kCountdownUpdateIntervalMs = 100; // 100 millisecond

[bartfab (slow), 2013/10/30 11:17:28]

* If the UI only shows seconds, why update it every 100ms?
* Nit: s/millisecond/milliseconds./

[binjin, 2013/11/19 14:43:46]

Done.

+
+}  // namespace
+
+namespace ash {
+
+namespace internal {
+
+LogoutConfirmationDialogView::LogoutConfirmationDialogView()
+    : weak_factory_(this) {
+  text_label_ = new views::Label;
+  text_label_->set_border(
+      views::Border::CreateEmptyBorder(0, kTrayPopupPaddingHorizontal,
+                                       0, kTrayPopupPaddingHorizontal));
+  text_label_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
+  text_label_->SetMultiLine(true);
+
+  SetLayoutManager(new views::FillLayout());
+
+  AddChildView(text_label_);
+}
+
+bool LogoutConfirmationDialogView::Accept() {
+  Shell::GetInstance()->system_tray_delegate()->SignOut();
+  return true;
+}
+
+ui::ModalType LogoutConfirmationDialogView::GetModalType() const {
+  return ui::MODAL_TYPE_SYSTEM;
+}
+
+string16 LogoutConfirmationDialogView::GetWindowTitle() const {
+  return l10n_util::GetStringUTF16(IDS_ASH_LOGOUT_CONFIRMATION_TITLE);
+}
+
+string16 LogoutConfirmationDialogView::GetDialogButtonLabel(
+    ui::DialogButton button) const {
+  if (button == ui::DIALOG_BUTTON_OK)
+    return l10n_util::GetStringUTF16(IDS_ASH_LOGOUT_CONFIRMATION_BUTTON);
+  return views::DialogDelegateView::GetDialogButtonLabel(button);
+}
+
+void LogoutConfirmationDialogView::Show(base::TimeDelta duration) {
+  countdown_start_time_ = base::TimeTicks::Now();
+  duration_ = duration;
+
+  UpdateCountdown();
+
+  views::DialogDelegate::CreateDialogWidget(
+      this, ash::Shell::GetPrimaryRootWindow(), NULL);
+  GetWidget()->Show();
+
+  timer_.Start(FROM_HERE,
+               base::TimeDelta::FromMilliseconds(kCountdownUpdateIntervalMs),
+               this,
+               &LogoutConfirmationDialogView::UpdateCountdown);
+}
+
+void LogoutConfirmationDialogView::UpdateCountdown() {
+  const base::TimeDelta logout_warning_time = countdown_start_time_

[bartfab (slow), 2013/10/30 11:17:28]

Could you rename this to something like "time_remaining" or "remaining_time"?

[binjin, 2013/11/19 14:43:46]

Done.

+      + duration_ - base::TimeTicks::Now();
+  if (logout_warning_time.InMilliseconds() > 0) {

[bartfab (slow), 2013/10/30 11:17:28]

This should be:

if (logout_warning_time > base::TimeDelta::FromSeconds(0)) {

[binjin, 2013/11/19 14:43:46]

Done.

+    text_label_->SetText(l10n_util::GetStringFUTF16(
+        IDS_ASH_LOGOUT_CONFIRMATION_WARNING,
+          ui::TimeFormat::TimeDurationLong(logout_warning_time)));

[bartfab (slow), 2013/10/30 11:17:28]

Nit: un-indent 2 spaces

[binjin, 2013/11/19 14:43:46]

Done.

+  } else {
+    text_label_->SetText(l10n_util::GetStringUTF16(
+        IDS_ASH_LOGOUT_CONFIRMATION_WARNING_NOW));
+    Shell::GetInstance()->system_tray_delegate()->SignOut();
+  }
+}
+
+void LogoutConfirmationDialogView::UpdateDialogDuration(
+    base::TimeDelta duration) {
+  duration_ = duration;
+  UpdateCountdown();
+}
+
+}  // namespace internal
+
+}  // namespace ash
+