[Mac] DownloadShelf should be notified when autoclosing.

chrome/browser/ui/chrome_pages.cc

 // Copyright (c) 2012 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/chrome_pages.h"
 
 #include "base/logging.h"
 #include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/browser/download/download_shelf.h"
@@ skipping 69 matching lines @@
   NavigateParams params(
       GetSingletonTabNavigateParams(browser, GURL(kChromeUIHistoryURL)));
   params.path_behavior = NavigateParams::IGNORE_AND_NAVIGATE;
   ShowSingletonTabOverwritingNTP(browser, params);
 }
 
 void ShowDownloads(Browser* browser) {
   content::RecordAction(UserMetricsAction("ShowDownloads"));
   if (browser->window()) {
     DownloadShelf* shelf = browser->window()->GetDownloadShelf();
+    // The downloads page is always shown in response to a user action.
     if (shelf->IsShowing())
-      shelf->Close();
+      shelf->Close(DownloadShelf::USER_ACTION);
   }
   ShowSingletonTabOverwritingNTP(
       browser,
       GetSingletonTabNavigateParams(browser, GURL(kChromeUIDownloadsURL)));
 }
 
 void ShowExtensions(Browser* browser,
                     const std::string& extension_to_highlight) {
   content::RecordAction(UserMetricsAction("ShowExtensions"));
   NavigateParams params(
@@ skipping 142 matching lines @@
                     const std::string& service,
                     const GURL& continue_url) {
   GURL url(GaiaUrls::GetInstance()->service_login_url());
   url = net::AppendQueryParameter(url, "service", service);
   if (continue_url.is_valid())
     url = net::AppendQueryParameter(url, "continue", continue_url.spec());
   NavigateToSingletonTab(browser, url);
 }
 
 }  // namespace chrome