Alternate NTP Mac: Show overlay at fixed position

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

 // Copyright 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 CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_OVERLAYABLE_CONTENTS_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_OVERLAYABLE_CONTENTS_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/memory/scoped_nsobject.h"
@@ skipping 34 matching lines @@
   CGFloat overlayHeight_;
   InstantSizeUnits overlayHeightUnits_;
 
   // If true then a shadow is drawn below the overlay. This is used to make the
   // overlay "float" over the tab's web contents.
   BOOL drawDropShadow_;
 
   // View responsible for drawing a drop shadow.
   scoped_nsobject<NSView> dropShadowView_;
 
+  // View responsible for drawing a separator at the top. The separator is
+  // only visible when the overlay is positioned right next to the omnibox.
+  scoped_nsobject<NSView> topSeparatorView_;
+
   BrowserWindowController* windowController_;
 
   // The vertical offset between the top of the view and the active container.
   // This is used to push the active container below the bookmark bar. Normally
   // this is set to the height of the bookmark bar so that the bookmark bar is
   // not obscured.
   CGFloat activeContainerOffset_;
 }
 
 @property(readonly, nonatomic) NSView* activeContainer;
@@ skipping 18 matching lines @@
 - (void)onActivateTabWithContents:(content::WebContents*)contents;
 
 // Returns YES if the overlay contents is currently showing.
 - (BOOL)isShowingOverlay;
 
 - (InstantOverlayControllerMac*)instantOverlayController;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_OVERLAYABLE_CONTENTS_CONTROLLER_H_