[CUPS] Implement the Print Job notification.

chrome/browser/chromeos/printing/cups_print_job_manager.cc

+// Copyright 2016 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/chromeos/printing/cups_print_job_manager.h"
+
+#include <algorithm>
+
+#include "chrome/browser/chromeos/printing/cups_print_job_notification_manager.h"
+
+namespace chromeos {
+
+CUPSPrintJobManager::CUPSPrintJobManager(Profile* profile)
+    : profile_(profile),
+      notification_manager_(new CUPSPrintJobNotificationManager(profile)) {
+  AddObserver(notification_manager_.get());

[stevenjb, 2016/10/26 19:59:58]

This is a bit backwards. Generally we would pass |this| to the
CupsPrintJobNotificationManager constructor and it would call
print_job_manager_->Add/RemoveObserver.

[xdai1, 2016/10/26 22:55:19]

I see. Modified as you suggested.

+}
+
+CUPSPrintJobManager::~CUPSPrintJobManager() {
+  if (notification_manager_)
+    RemoveObserver(notification_manager_.get());
+  print_jobs_.clear();
+  profile_ = nullptr;
+}
+
+void CUPSPrintJobManager::Shutdown() {}
+
+void CUPSPrintJobManager::AddObserver(Observer* observer) {
+  auto found = std::find(observers_.begin(), observers_.end(), observer);
+  if (found == observers_.end())
+    observers_.push_back(observer);
+}
+
+void CUPSPrintJobManager::RemoveObserver(Observer* observer) {
+  auto found = std::find(observers_.begin(), observers_.end(), observer);
+  if (found != observers_.end())
+    observers_.erase(found);
+}
+
+}  // namespace chromeos