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

chrome/browser/ui/gtk/download/download_shelf_gtk.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 "chrome/browser/ui/gtk/download/download_shelf_gtk.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "chrome/browser/download/download_item_model.h"
@@ skipping 201 matching lines @@
 
 void DownloadShelfGtk::Closed() {
   // When the close animation is complete, remove all completed downloads.
   size_t i = 0;
   while (i < download_items_.size()) {
     DownloadItem* download = download_items_[i]->get_download();
     bool is_transfer_done = download->IsComplete() ||
                             download->IsCancelled() ||
                             download->IsInterrupted();
     if (is_transfer_done &&
-        download->safety_state() != DownloadItem::DANGEROUS) {
+        download->GetSafetyState() != DownloadItem::DANGEROUS) {
       RemoveDownloadItem(download_items_[i]);
     } else {
       // We set all remaining items as "opened", so that the shelf will auto-
       // close in the future without the user clicking on them.
-      download->set_opened(true);
+      download->SetOpened(true);
       ++i;
     }
   }
 }
 
 void DownloadShelfGtk::Observe(int type,
                                const content::NotificationSource& source,
                                const content::NotificationDetails& details) {
   if (type == chrome::NOTIFICATION_BROWSER_THEME_CHANGED) {
     GdkColor color = theme_service_->GetGdkColor(
@@ skipping 58 matching lines @@
     Close();
   } else {
     // The link button was clicked.
     browser_->ShowDownloadsTab();
   }
 }
 
 void DownloadShelfGtk::AutoCloseIfPossible() {
   for (std::vector<DownloadItemGtk*>::iterator iter = download_items_.begin();
        iter != download_items_.end(); ++iter) {
-    if (!(*iter)->get_download()->opened())
+    if (!(*iter)->get_download()->GetOpened())
       return;
   }
 
   SetCloseOnMouseOut(true);
 }
 
 void DownloadShelfGtk::CancelAutoClose() {
   SetCloseOnMouseOut(false);
   weak_factory_.InvalidateWeakPtrs();
 }
@@ skipping 61 matching lines @@
 
   MessageLoop::current()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&DownloadShelfGtk::Close, weak_factory_.GetWeakPtr()),
       kAutoCloseDelayMs);
 }
 
 void DownloadShelfGtk::MouseEnteredShelf() {
   weak_factory_.InvalidateWeakPtrs();
 }