Move download shelf from per-tab to per-window

chrome/browser/gtk/browser_window_gtk.h

Index: chrome/browser/gtk/browser_window_gtk.h
===================================================================
--- chrome/browser/gtk/browser_window_gtk.h	(revision 17483)
+++ chrome/browser/gtk/browser_window_gtk.h	(working copy)
@@ -16,6 +16,7 @@
 
 class BookmarkBarGtk;
 class BrowserToolbarGtk;
+class DownloadShelfGtk;
 class FindBarGtk;
 class InfoBarContainerGtk;
 class LocationBar;
@@ -68,6 +69,8 @@
   virtual void ShowAboutChromeDialog();
   virtual void ShowBookmarkManager();
   virtual void ShowBookmarkBubble(const GURL& url, bool already_bookmarked);
+  virtual bool IsDownloadShelfVisible() const;
+  virtual DownloadShelf* GetDownloadShelf();
   virtual void ShowReportBugDialog();
   virtual void ShowClearBrowsingDataDialog();
   virtual void ShowImportDialog();
@@ -122,6 +125,9 @@
 
   scoped_ptr<Browser> browser_;
 
+  // The download shelf view (view at the bottom of the page).
+  scoped_ptr<DownloadShelfGtk> download_shelf_;
+
  private:
   // Sets the default size for the window and the the way the user is allowed to
   // resize it.