Implement NativeWidgetMac::ReorderNativeViews

ui/views/widget/widget_mac_utils.h

Index: ui/views/widget/widget_mac_utils.h
diff --git a/ui/views/widget/widget_mac_utils.h b/ui/views/widget/widget_mac_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..9f3f5eced8e1823bce3c990658e8d15372b41657
--- /dev/null
+++ b/ui/views/widget/widget_mac_utils.h
@@ -0,0 +1,22 @@
+// 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.
+
+#ifndef UI_VIEWS_WIDGET_WIDGET_MAC_UTILS_H_
+#define UI_VIEWS_WIDGET_WIDGET_MAC_UTILS_H_
+
+#import <Cocoa/Cocoa.h>
+
+namespace views {
+
+class NativeViewHost;
+class Widget;
+
+extern int kAssociatedViewHostKey;
+
+void AttachNSViewRelatedToHost(NSView* native_view, NativeViewHost* host);
+void ReorderChildNSViews(Widget* widget);
+
+}  // namespace views
+
+#endif  // UI_VIEWS_WIDGET_WIDGET_MAC_UTILS_H_