Added system notification for update_engine.

chrome/browser/chromeos/cros/update_library.cc

+// Copyright (c) 2009 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/cros/update_library.h"
+
+#include "base/message_loop.h"
+#include "base/string_util.h"
+#include "chrome/browser/chrome_thread.h"
+#include "chrome/browser/chromeos/cros/cros_library.h"
+
+// Allows InvokeLater without adding refcounting. This class is a Singleton and
+// won't be deleted until it's last InvokeLater is run.
+DISABLE_RUNNABLE_METHOD_REFCOUNT(chromeos::UpdateLibraryImpl);
+
+namespace chromeos {
+
+UpdateLibraryImpl::UpdateLibraryImpl()
+    : status_connection_(NULL) {
+  if (CrosLibrary::Get()->EnsureLoaded()) {
+    Init();
+  }
+}
+
+UpdateLibraryImpl::~UpdateLibraryImpl() {
+  if (status_connection_) {
+    DisconnectUpdateProgress(status_connection_);
+  }
+}
+
+void UpdateLibraryImpl::AddObserver(Observer* observer) {
+  observers_.AddObserver(observer);
+}
+
+void UpdateLibraryImpl::RemoveObserver(Observer* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+const UpdateLibrary::Status& UpdateLibraryImpl::status() const {
+  return status_;
+}
+
+// static
+void UpdateLibraryImpl::ChangedHandler(void* object,
+    const UpdateProgress& status) {
+  UpdateLibraryImpl* power = static_cast<UpdateLibraryImpl*>(object);
+  power->UpdateStatus(Status(status));
+}
+
+void UpdateLibraryImpl::Init() {
+  status_connection_ = MonitorUpdateStatus(&ChangedHandler, this);
+}
+
+void UpdateLibraryImpl::UpdateStatus(const Status& status) {
+  // Make sure we run on UI thread.
+  if (!ChromeThread::CurrentlyOn(ChromeThread::UI)) {
+    ChromeThread::PostTask(
+        ChromeThread::UI, FROM_HERE,
+        NewRunnableMethod(this, &UpdateLibraryImpl::UpdateStatus, status));
+    return;
+  }
+
+  status_ = status;
+  FOR_EACH_OBSERVER(Observer, observers_, Changed(this));
+}
+
+}  // namespace chromeos
+