gtk: Move DownloadShelfGtk data member to private section of BrowserWindowGtk.

chrome/browser/ui/gtk/browser_window_gtk.h

Index: chrome/browser/ui/gtk/browser_window_gtk.h
diff --git a/chrome/browser/ui/gtk/browser_window_gtk.h b/chrome/browser/ui/gtk/browser_window_gtk.h
index 7cff44ac4bcf27b852926a60bbb2d90cb81e85b4..a71134fb9951c8d2f97c21bd70dcb301fb7d901a 100644
--- a/chrome/browser/ui/gtk/browser_window_gtk.h
+++ b/chrome/browser/ui/gtk/browser_window_gtk.h
@@ -292,9 +292,6 @@ class BrowserWindowGtk : public BrowserWindow,
 
   scoped_ptr<Browser> browser_;
 
-  // The download shelf view (view at the bottom of the page).
-  scoped_ptr<DownloadShelfGtk> download_shelf_;
-
  private:
   // Show or hide the bookmark bar.
   void MaybeShowBookmarkBar(bool animate);
@@ -457,6 +454,9 @@ class BrowserWindowGtk : public BrowserWindow,
   // bookmark bar is not supported.
   scoped_ptr<BookmarkBarGtk> bookmark_bar_;
 
+  // The download shelf view (view at the bottom of the page).
+  scoped_ptr<DownloadShelfGtk> download_shelf_;
+
   // The status bubble manager.  Always non-NULL.
   scoped_ptr<StatusBubbleGtk> status_bubble_;