Adds MD ink ripple animations to buttons within location bar

ui/views/widget/widget_observer_view.h

+// Copyright (c) 2012 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.
+
+#ifndef UI_VIEWS_WIDGET_WIDGET_OBSERVER_VIEW_H_
+#define UI_VIEWS_WIDGET_WIDGET_OBSERVER_VIEW_H_
+
+#include "ui/views/view.h"
+#include "ui/views/views_export.h"
+#include "ui/views/widget/widget_observer.h"
+
+namespace views {
+
+class VIEWS_EXPORT WidgetObserverView : public WidgetObserver, public View {
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_WIDGET_WIDGET_OBSERVER_VIEW_H_