Added ability to set ChromeDownloadManagerDelegate for testing.

chrome/browser/download/chrome_download_manager_delegate.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_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 65 matching lines @@
                           FilePath* website_save_dir,
                           FilePath* download_save_dir) OVERRIDE;
   virtual void ChooseSavePath(const base::WeakPtr<SavePackage>& save_package,
                               const FilePath& suggested_path,
                               bool can_save_as_complete) OVERRIDE;
   virtual void DownloadProgressUpdated() OVERRIDE;
 
   DownloadPrefs* download_prefs() { return download_prefs_.get(); }
   DownloadHistory* download_history() { return download_history_.get(); }
 
+ protected:
+  // So that test classes can inherit from this for override purposes.
+  virtual ~ChromeDownloadManagerDelegate();
+
+  // So that test classes that inherit from this for override purposes
+  // can call back into the DownloadManager.
+  scoped_refptr<DownloadManager> download_manager_;
+
  private:
   friend class base::RefCountedThreadSafe<ChromeDownloadManagerDelegate>;
-  virtual ~ChromeDownloadManagerDelegate();
 
   // NotificationObserver implementation.
   virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details) OVERRIDE;
 
   // Callback function after url is checked with safebrowsing service.
   void CheckDownloadUrlDone(int32 download_id, bool is_dangerous_url);
 
   // Callback function after we check whether the referrer URL has been visited
@@ skipping 22 matching lines @@
                        bool visited_referrer_before);
 
   // Callback from history system.
   void OnItemAddedToPersistentStore(int32 download_id, int64 db_handle);
 
   // Callback function after download file hash is checked with safebrowsing
   // service.
   void CheckDownloadHashDone(int32 download_id, bool is_dangerous_hash);
 
   Profile* profile_;
-  scoped_refptr<DownloadManager> download_manager_;
   scoped_ptr<DownloadPrefs> download_prefs_;
   scoped_ptr<DownloadHistory> download_history_;
 
   // Maps from pending extension installations to DownloadItem IDs.
   typedef base::hash_map<CrxInstaller*, int> CrxInstallerMap;
   CrxInstallerMap crx_installers_;
 
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeDownloadManagerDelegate);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_CHROME_DOWNLOAD_MANAGER_DELEGATE_H_