Adds a first-run balloon to the Windows notification center.

chrome/browser/notifications/message_center_notification_manager_win.cc

+// 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 "chrome/browser/notifications/message_center_notification_manager.h"
+
+#include "chrome/common/pref_names.h"
+#include "ui/message_center/message_center_tray.h"
+
+namespace {
+// The first-run balloon will be shown |kFirstRunIdleDelaySeconds| after all
+// popups go away and the user has notifications in the message center.
+const int kFirstRunIdleDelaySeconds = 1;
+}  // namespace
+
+void MessageCenterNotificationManager::DisplayFirstRunBalloon() {
+  // Store for posterity the fact that we've shown the first-run balloon.
+  DCHECK(tray_.get());
+  first_run_pref_.SetValue(true);
+  tray_->DisplayFirstRunBalloon();
+}
+
+void MessageCenterNotificationManager::CheckFirstRunTimer() {
+  // If there is no tray_, we can't display a balloon here anyway.
+  // Also, we only want to display the first run balloon once, so the pref will
+  // store the flag on disk based on whether we ever showed the balloon.
+  DCHECK(tray_.get());
+  if (first_run_pref_.GetValue())
+    return;
+
+  // If there are popups, the message center is visible, or there are no more
+  // notifications, don't continue the timer since it will be annoying or
+  // useless.
+  if (message_center_->HasPopupNotifications() ||
+      message_center_->IsMessageCenterVisible() ||
+      0 == message_center_->NotificationCount()) {
+    first_run_balloon_timer_.Stop();
+    return;
+  }
+
+  // No need to restart the timer if it's already going.
+  if (first_run_balloon_timer_.IsRunning())
+    return;
+
+  first_run_balloon_timer_.Start(
+      FROM_HERE,
+      first_run_idle_timeout_,
+      base::Bind(&MessageCenterNotificationManager::DisplayFirstRunBalloon,
+                 weak_factory_.GetWeakPtr()));
+}