[Eraser] First pass at removing the notification center panel.

chrome/browser/notifications/message_center_notification_manager_win.cc

-// Copyright 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 "ui/message_center/message_center_tray.h"
-
-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::SetFirstRunTimeoutForTest(
-    base::TimeDelta timeout) {
-  first_run_idle_timeout_ = timeout;
-}
-
-bool MessageCenterNotificationManager::FirstRunTimerIsActive() const {
-  return first_run_balloon_timer_.IsRunning();
-}
-
-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()));
-}