Delete the GTK+ port of Chrome.

chrome/browser/download/drag_download_item_views.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/download/drag_download_item.h"
 
 #include <string>
 
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/download_item.h"
@@ skipping 42 matching lines @@
       drive::DownloadHandler::GetForProfile(profile);
   if (drive_download_handler &&
       drive_download_handler->IsDriveDownload(download))
     full_path = drive_download_handler->GetCacheFilePath(download);
 #endif
   std::vector<ui::FileInfo> file_infos;
   file_infos.push_back(
       ui::FileInfo(full_path, download->GetFileNameToReportUser()));
   data.SetFilenames(file_infos);
 
-#if !defined(TOOLKIT_GTK)
 #if defined(USE_AURA)
   aura::Window* root_window = view->GetRootWindow();
   if (!root_window || !aura::client::GetDragDropClient(root_window))
     return;
 
   gfx::Point location = gfx::Screen::GetScreenFor(view)->GetCursorScreenPoint();
   // TODO(varunjain): Properly determine and send DRAG_EVENT_SOURCE below.
   aura::client::GetDragDropClient(root_window)->StartDragAndDrop(
       data,
       root_window,
       view,
       location,
       ui::DragDropTypes::DRAG_COPY | ui::DragDropTypes::DRAG_LINK,
       ui::DragDropTypes::DRAG_EVENT_SOURCE_MOUSE);
 #else  // We are on WIN without AURA
   // We cannot use Widget::RunShellDrag on WIN since the |view| is backed by a
   // WebContentsViewWin, not a NativeWidgetWin.
   scoped_refptr<ui::DragSourceWin> drag_source(new ui::DragSourceWin);
   // Run the drag and drop loop
   DWORD effects;
   DoDragDrop(ui::OSExchangeDataProviderWin::GetIDataObject(data),
              drag_source.get(),
              DROPEFFECT_COPY | DROPEFFECT_LINK,
              &effects);
 #endif
-
-#else
-  GtkWidget* root = gtk_widget_get_toplevel(view);
-  if (!root)
-    return;
-
-  views::NativeWidgetGtk* widget = static_cast<views::NativeWidgetGtk*>(
-      views::Widget::GetWidgetForNativeView(root)->native_widget());
-  if (!widget)
-    return;
-
-  widget->DoDrag(data,
-                 ui::DragDropTypes::DRAG_COPY | ui::DragDropTypes::DRAG_LINK);
-#endif  // TOOLKIT_GTK
 }