Browser side support (sans UI) for desktop notifications....

chrome/browser/notifications/notification_object_proxy.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/notifications/notification_object_proxy.h"
+
+#include "base/message_loop.h"
+#include "base/string16.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/chrome_thread.h"
+#include "chrome/browser/renderer_host/render_view_host.h"
+#include "chrome/common/render_messages.h"
+
+NotificationObjectProxy::NotificationObjectProxy(int process_id, int route_id,
+    int notification_id, bool worker)
+    : process_id_(process_id),
+      route_id_(route_id),
+      notification_id_(notification_id),
+      worker_(worker) {
+}
+
+void NotificationObjectProxy::Display() {
+  if (worker_) {
+    // TODO(johnnyg): http://crbug.com/23065  Worker support coming soon.
+    NOTREACHED();
+  } else {
+    DeliverMessage(new ViewMsg_PostDisplayToNotificationObject(
+        route_id_, notification_id_));
+  }
+}
+
+void NotificationObjectProxy::Error() {
+  if (worker_) {
+    // TODO(johnnyg): http://crbug.com/23065  Worker support coming soon.
+    NOTREACHED();
+  } else {
+    DeliverMessage(new ViewMsg_PostErrorToNotificationObject(
+        route_id_, notification_id_, string16()));
+  }
+}
+
+void NotificationObjectProxy::Close(bool by_user) {
+  if (worker_) {
+    // TODO(johnnyg): http://crbug.com/23065  Worker support coming soon.
+    NOTREACHED();
+  } else {
+    DeliverMessage(new ViewMsg_PostCloseToNotificationObject(
+        route_id_, notification_id_, by_user));
+  }
+}
+
+void NotificationObjectProxy::DeliverMessage(IPC::Message* message) {
+  DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
+  MessageLoop* io_loop = ChromeThread::GetMessageLoop(ChromeThread::IO);
+  if (io_loop) {
+    io_loop->PostTask(FROM_HERE,
+        NewRunnableMethod(this, &NotificationObjectProxy::Send, message));
+  }
+}
+
+// Deferred method which runs on the IO thread and sends a message to the
+// proxied notification, routing it through the correct host in the browser.
+void NotificationObjectProxy::Send(IPC::Message* message) {
+  DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
+  RenderViewHost* host = RenderViewHost::FromID(process_id_, route_id_);
+  if (host)
+    host->Send(message);
+}