Improve the UI for disabling off-store extension install.

chrome/browser/download/chrome_download_manager_delegate.h

 // 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.
 
 #ifndef CHROME_BROWSER_DOWNLOAD_CHROME_DOWNLOAD_MANAGER_DELEGATE_H_
 #define CHROME_BROWSER_DOWNLOAD_CHROME_DOWNLOAD_MANAGER_DELEGATE_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "base/hash_tables.h"
@@ skipping 30 matching lines @@
 // This is the Chrome side helper for the download system.
 class ChromeDownloadManagerDelegate
     : public base::RefCountedThreadSafe<ChromeDownloadManagerDelegate>,
       public content::DownloadManagerDelegate,
       public content::NotificationObserver {
  public:
   explicit ChromeDownloadManagerDelegate(Profile* profile);
 
   void SetDownloadManager(content::DownloadManager* dm);
 
-  // Returns true if the given item is for an extension download.
-  static bool IsExtensionDownload(const content::DownloadItem* item);
-
   // Should be called before the first call to ShouldCompleteDownload() to
   // disable SafeBrowsing checks for |item|.
   static void DisableSafeBrowsing(content::DownloadItem* item);
 
   virtual void Shutdown() OVERRIDE;
   virtual content::DownloadId GetNextId() OVERRIDE;
   virtual bool ShouldStartDownload(int32 download_id) OVERRIDE;
   virtual void ChooseDownloadPath(content::WebContents* web_contents,
                                   const FilePath& suggested_path,
                                   int32 download_id) OVERRIDE;
@@ skipping 111 matching lines @@
   // Maps from pending extension installations to DownloadItem IDs.
   typedef base::hash_map<CrxInstaller*, int> CrxInstallerMap;
   CrxInstallerMap crx_installers_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeDownloadManagerDelegate);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_CHROME_DOWNLOAD_MANAGER_DELEGATE_H_