Split DownloadItem into an ABC, an Impl, and a Mock.

content/shell/shell_download_manager_delegate.cc

 // 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.
 
 #include "content/shell/shell_download_manager_delegate.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <commdlg.h>
 #endif
@@ skipping 24 matching lines @@
     DownloadManager* download_manager) {
   download_manager_ = download_manager;
 }
 
 void ShellDownloadManagerDelegate::Shutdown() {
 }
 
 bool ShellDownloadManagerDelegate::ShouldStartDownload(int32 download_id) {
   DownloadItem* download =
       download_manager_->GetActiveDownloadItem(download_id);
-  DownloadStateInfo state = download->state_info();
+  DownloadStateInfo state = download->GetStateInfo();
 
   if (!state.force_file_name.empty())
     return true;
 
   FilePath generated_name = net::GenerateFileName(
       download->GetURL(),
-      download->content_disposition(),
-      download->referrer_charset(),
-      download->suggested_filename(),
-      download->mime_type(),
+      download->GetContentDisposition(),
+      download->GetReferrerCharset(),
+      download->GetSuggestedFilename(),
+      download->GetMimeType(),
       "download");
 
   // Since we have no download UI, show the user a dialog always.
   state.prompt_user_for_save_location = true;
 
   BrowserThread::PostTask(
       BrowserThread::FILE,
       FROM_HERE,
       base::Bind(
           &ShellDownloadManagerDelegate::GenerateFilename,
@@ skipping 132 matching lines @@
 void ShellDownloadManagerDelegate::ChooseSavePath(
     const base::WeakPtr<SavePackage>& save_package,
     const FilePath& suggested_path,
     bool can_save_as_complete) {
 }
 
 void ShellDownloadManagerDelegate::DownloadProgressUpdated() {
 }
 
 }  // namespace content