Mac: Highlight selected tile in tabpose.

chrome/browser/cocoa/tabpose_window.h

 // Copyright (c) 2010 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_COCOA_TABPOSE_WINDOW_H_
 #define CHROME_BROWSER_COCOA_TABPOSE_WINDOW_H_
 #pragma once
 
 #import <Cocoa/Cocoa.h>
 
@@ skipping 30 matching lines @@
 @interface TabposeWindow : NSWindow {
  @private
   tabpose::WindowState state_;
 
   // The root layer added to the content view. Covers the whole window.
   CALayer* rootLayer_;  // weak
 
   // The layer showing the background layer. Covers the whole visible area.
   CALayer* bgLayer_;  // weak
 
+  // The layer drawn behind the currently selected tile.
+  CALayer* selectionHighlight_;  // weak
+
+  // Colors used by the layers.
   scoped_cftyperef<CGColorRef> gray_;
+  scoped_cftyperef<CGColorRef> darkBlue_;
 
   TabStripModel* tabStripModel_;  // weak
 
   // Stores all preview layers. The order in here matches the order in
   // the tabstrip model.
-  scoped_nsobject<NSArray> allLayers_;
+  scoped_nsobject<NSArray> allThumbnailLayers_;
 
   // Manages the state of all layers.
   scoped_ptr<tabpose::TileSet> tileSet_;
 }
 
 // Shows a TabposeWindow on top of |parent|, with |rect| being the active area.
 // If |slomo| is YES, then the appearance animation is shown in slow motion.
 // The window blocks all keyboard and mouse events and releases itself when
 // closed.
 + (id)openTabposeFor:(NSWindow*)parent
                 rect:(NSRect)rect
                slomo:(BOOL)slomo
        tabStripModel:(TabStripModel*)tabStripModel;
 @end
 
 #endif  // CHROME_BROWSER_COCOA_TABPOSE_WINDOW_H_