Move download shelf from per-tab to per-window

chrome/browser/views/download_shelf_view.h

Index: chrome/browser/views/download_shelf_view.h
===================================================================
--- chrome/browser/views/download_shelf_view.h	(revision 17483)
+++ chrome/browser/views/download_shelf_view.h	(working copy)
@@ -16,7 +16,8 @@
 }
 
 class BaseDownloadItemModel;
-class TabContents;
+class Browser;
+class BrowserView;
 
 class DownloadAnimation;
 
@@ -33,7 +34,7 @@
                           public views::LinkController,
                           public AnimationDelegate {
  public:
-  explicit DownloadShelfView(TabContents* tab_contents);
+  explicit DownloadShelfView(Browser* browser, BrowserView* parent);
 
   // Implementation of View.
   virtual gfx::Size GetPreferredSize();
@@ -57,6 +58,8 @@
   virtual void AddDownload(BaseDownloadItemModel* download_model);
   virtual bool IsShowing() const;
   virtual bool IsClosing() const;
+  virtual void Show();
+  virtual void Close();
 
   // Removes a specified download view. The supplied view is deleted after
   // it's removed.
@@ -97,6 +100,9 @@
   // deleted by View.
   views::ImageButton* close_button_;
 
+  // The window this shelf belongs to.
+  BrowserView* parent_;
+
   DISALLOW_COPY_AND_ASSIGN(DownloadShelfView);
 };