Mask the close button on the download shelf so that it's visible even in dark...

chrome/browser/views/download_shelf_view.h

 // Copyright (c) 2006-2008 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_VIEWS_DOWNLOAD_SHELF_VIEW_H_
 #define CHROME_BROWSER_VIEWS_DOWNLOAD_SHELF_VIEW_H_
 
 #include "app/slide_animation.h"
 #include "chrome/browser/download/download_shelf.h"
 #include "views/controls/button/button.h"
@@ skipping 63 matching lines @@
   // DownloadShelfView takes ownership of the View, and will delete it as
   // necessary.
   void AddDownloadView(views::View* view);
 
   // Paints the border.
   void PaintBorder(gfx::Canvas* canvas);
 
   // Returns true if the shelf is wide enough to show the first download item.
   bool CanFitFirstDownloadItem();
 
+  // Called on theme change.
+  void UpdateButtonColors();
+
+  // Overridden from views::View.
+  virtual void ThemeChanged();
+
   // The browser for this shelf.
   Browser* browser_;
 
   // The animation for adding new items to the shelf.
   scoped_ptr<SlideAnimation> new_item_animation_;
 
   // The show/hide animation for the shelf itself.
   scoped_ptr<SlideAnimation> shelf_animation_;
 
   // The download views. These are also child Views, and deleted when
@@ skipping 11 matching lines @@
   // deleted by View.
   views::ImageButton* close_button_;
 
   // The window this shelf belongs to.
   BrowserView* parent_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadShelfView);
 };
 
 #endif  // CHROME_BROWSER_VIEWS_DOWNLOAD_SHELF_VIEW_H_