Move DrawDownloadItem() implementation to download_item_drag.cc

chrome/browser/ui/gtk/download/download_item_drag.cc

 // Copyright 2013 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_item_drag.h"
 
 #include "base/files/file_path.h"
 #include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/download/drag_download_item.h"
 #include "content/public/browser/download_item.h"
 #include "net/base/net_util.h"
 #include "ui/base/dragdrop/gtk_dnd_util.h"
 #include "ui/gfx/image/image.h"
 #include "url/gurl.h"
 
 using content::DownloadItem;
 
 namespace {
 
@@ skipping 100 matching lines @@
 
 DownloadItemDrag::~DownloadItemDrag() {}
 
 void DownloadItemDrag::OnDragDataGet(GtkWidget* widget,
                                      GdkDragContext* context,
                                      GtkSelectionData* selection_data,
                                      guint target_type,
                                      guint time) {
   drag_data_->OnDragDataGet(widget, context, selection_data, target_type, time);
 }
+
+void DragDownloadItem(const content::DownloadItem* download,
+                      gfx::Image* icon,
+                      gfx::NativeView view) {
+  DownloadItemDrag::BeginDrag(download, icon);
+}