Detect removed files and reflect the state in chrome://downloads and the download shelf

chrome/browser/ui/browser.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_UI_BROWSER_H_
 #define CHROME_BROWSER_UI_BROWSER_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 631 matching lines @@
   // disposition type of the command will be stored in |*disposition| if it's
   // not null.
   int GetLastBlockedCommand(WindowOpenDisposition* disposition);
 
   // Called by browser::Navigate() when a navigation has occurred in a tab in
   // this Browser. Updates the UI for the start of this navigation.
   void UpdateUIForNavigationInTab(TabContentsWrapper* contents,
                                   PageTransition::Type transition,
                                   bool user_initiated);
 
+  // Checks whether downloaded files still exist. Updates state of downloads
+  // that refer to removed files. The check runs in the background and may
+  // finish asynchronously after this method returns.
+  void CheckForFilesRemoval();
+
   // Called by browser::Navigate() to retrieve the home page if no URL is
   // specified.
   GURL GetHomePage() const;
 
   // Interface implementations ////////////////////////////////////////////////
 
   // Overridden from PageNavigator:
   virtual void OpenURL(const GURL& url, const GURL& referrer,
                        WindowOpenDisposition disposition,
                        PageTransition::Type transition);
@@ skipping 542 matching lines @@
   // Helper which implements the TabRestoreServiceDelegate interface.
   scoped_ptr<BrowserTabRestoreServiceDelegate> tab_restore_service_delegate_;
 
   scoped_ptr<InstantController> instant_;
   scoped_ptr<InstantUnloadHandler> instant_unload_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_H_