Adds UI components for desktop notifications, including balloon view classes ...

chrome/browser/notifications/balloon_collection_mac.mm

+// 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/balloon_collection.h"
+
+#include "base/gfx/size.h"
+#include "base/logging.h"
+
+Balloon* BalloonCollectionImpl::MakeBalloon(const Notification& notification,
+                                            Profile* profile) {
+  // TODO(johnnyg): http://crbug.com/23066.  Part of future Mac support.
+  NOTIMPLEMENTED();
+  return NULL;
+}
+
+bool BalloonCollectionImpl::Layout::RefreshSystemMetrics() {
+  // TODO(johnnyg): http://crbug.com/23066.  Part of future Mac support.
+  NOTIMPLEMENTED();
+  return false;
+}
+