Alternate NTP Mac: Show overlay at fixed position

chrome/browser/ui/cocoa/tab_contents/overlay_separator_view.h

+// Copyright 2013 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 CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_OVERLAY_SEPARATOR_VIEW_H_
+#define CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_OVERLAY_SEPARATOR_VIEW_H_
+
+#import <Cocoa/Cocoa.h>
+
+#include "chrome/browser/ui/cocoa/background_gradient_view.h"
+
+// A view used to draw a separator above Instant overlay view.
+@interface OverlayTopSeparatorView : BackgroundGradientView {
+}
+
++ (CGFloat)preferredHeight;
+
+@end
+
+// A view used to draw a drop shadow beneath the Instant overlay view.
+@interface OverlayBottomSeparatorView : NSView {
+}
+
++ (CGFloat)preferredHeight;
+
+@end
+
+#endif  // CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_OVERLAY_SEPARATOR_VIEW_H_