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

chrome/browser/ui/views/download/download_item_view.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.
 //
 // A ChromeView that implements one download on the Download shelf.
 // Each DownloadItemView contains an application icon, a text label
 // indicating the download's file name, a text label indicating the
 // download's status (such as the number of bytes downloaded so far)
 // and a button for canceling an in progress download, or opening
 // the completed download.
@@ skipping 179 matching lines @@
   const SkBitmap* warning_icon_;
 
   // The model we query for display information
   DownloadItem* download_;
 
   // Our parent view that owns us.
   DownloadShelfView* parent_;
 
   // Elements of our particular download
   std::wstring status_text_;
-  bool show_status_text_;
 
   // The font used to print the file name and status.
   gfx::Font font_;
 
   // The tooltip.
   std::wstring tooltip_text_;
 
   // The current state (normal, hot or pushed) of the body and drop-down.
   State body_state_;
   State drop_down_state_;
@@ skipping 72 matching lines @@
   // might delete us).
   bool* deleted_;
 
   // The name of this view as reported to assistive technology.
   string16 accessible_name_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_DOWNLOAD_DOWNLOAD_ITEM_VIEW_H__