[Mac] Makes the download shelf auto-close after the user opens all downloads...

chrome/browser/ui/cocoa/download/download_item_mac.mm

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/ui/cocoa/download/download_item_mac.h"
 
 #include "base/callback.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/download/download_item.h"
 #include "chrome/browser/download/download_item_model.h"
@@ skipping 46 matching lines @@
       // fall through
     case DownloadItem::IN_PROGRESS:
     case DownloadItem::CANCELLED:
       [item_controller_ setStateFromDownload:download_model_.get()];
       break;
     default:
       NOTREACHED();
   }
 }
 
+void DownloadItemMac::OnDownloadOpened(DownloadItem* download) {
+  DCHECK_EQ(download, download_model_->download());
+  [item_controller_ downloadWasOpened];
+}
+
 void DownloadItemMac::LoadIcon() {
   IconManager* icon_manager = g_browser_process->icon_manager();
   if (!icon_manager) {
     NOTREACHED();
     return;
   }
 
   // We may already have this particular image cached.
   FilePath file = download_model_->download()->GetUserVerifiedFilePath();
   SkBitmap* icon_bitmap = icon_manager->LookupIcon(file, IconLoader::SMALL);
@@ skipping 10 matching lines @@
 }
 
 void DownloadItemMac::OnExtractIconComplete(IconManager::Handle handle,
                                             SkBitmap* icon_bitmap) {
   if (!icon_bitmap)
     return;
 
   NSImage* icon = gfx::SkBitmapToNSImage(*icon_bitmap);
   [item_controller_ setIcon:icon];
 }