Move download shelf from per-tab to per-window

chrome/browser/tab_contents/tab_contents_delegate.h

Index: chrome/browser/tab_contents/tab_contents_delegate.h
===================================================================
--- chrome/browser/tab_contents/tab_contents_delegate.h	(revision 17483)
+++ chrome/browser/tab_contents/tab_contents_delegate.h	(working copy)
@@ -11,6 +11,7 @@
 #include "chrome/common/page_transition_types.h"
 #include "webkit/glue/window_open_disposition.h"
 
+class DownloadItem;
 class ExtensionFunctionDispatcher;
 class RenderViewHost;
 class TabContents;
@@ -89,9 +90,6 @@
   // Notification that the target URL has changed
   virtual void UpdateTargetURL(TabContents* source, const GURL& url) = 0;
 
-  // Notification that the download shelf visibility state has been toggled.
-  virtual void UpdateDownloadShelfVisibility(bool visible) { }
-
   // Notification that there was a mouse event
   virtual void ContentsMouseEvent(TabContents* source, bool motion) { }
 
@@ -178,6 +176,9 @@
     return 0;
   }
 
+  virtual void OnStartDownload(DownloadItem* download) {
+  }
+
  protected:
   ~TabContentsDelegate() {}