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

content/browser/download/drag_download_file.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/browser/download/drag_download_file.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/message_loop.h"
 #include "content/browser/browser_context.h"
@@ skipping 156 matching lines @@
 void DragDownloadFile::ModelChanged() {
   AssertCurrentlyOnUIThread();
 
   if (download_item_)
     return;
 
   std::vector<DownloadItem*> downloads;
   download_manager_->GetTemporaryDownloads(file_path_.DirName(), &downloads);
   for (std::vector<DownloadItem*>::const_iterator i = downloads.begin();
        i != downloads.end(); ++i) {
-    if ((*i)->original_url() == url_) {
+    if ((*i)->GetOriginalUrl() == url_) {
       download_item_ = *i;
       download_item_->AddObserver(this);
       break;
     }
   }
 }
 
 void DragDownloadFile::OnDownloadUpdated(DownloadItem* download) {
   AssertCurrentlyOnUIThread();
-  if (download->IsCancelled() || download->state() == DownloadItem::REMOVING) {
+  if (download->IsCancelled() ||
+      (download->GetState() == DownloadItem::REMOVING)) {
     RemoveObservers();
     DownloadCompleted(false);
   } else if (download->IsComplete()) {
     RemoveObservers();
     DownloadCompleted(true);
   }
   // Ignore other states.
 }
 
 void DragDownloadFile::AssertCurrentlyOnDragThread() {
@@ skipping 23 matching lines @@
 
 void DragDownloadFile::QuitNestedMessageLoop() {
   AssertCurrentlyOnDragThread();
 
   if (is_running_nested_message_loop_) {
     is_running_nested_message_loop_ = false;
     MessageLoop::current()->Quit();
   }
 }
 #endif