Move DragDownloadItem() implementation to download_item_drag.cc

BUG=None
TEST=none, no functional change
R=asanka@chromium.org, erg@chromium.org

Review URL: https://codereview.chromium.org/23522023

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221783 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/download/drag_download_item_gtk.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 "chrome/browser/ui/gtk/download/download_item_drag.h"
-
-void DragDownloadItem(const content::DownloadItem* download,
-                      gfx::Image* icon,
-                      gfx::NativeView view) {
-  DownloadItemDrag::BeginDrag(download, icon);
-}

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

@@ -6,6 +6,7 @@
 
 #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"
@@ -126,3 +127,9 @@ void DownloadItemDrag::OnDragDataGet(GtkWidget* widget,
                                      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);
+}

chrome/chrome_browser.gypi

@@ -548,7 +548,6 @@
         'browser/download/download_ui_controller.cc',
         'browser/download/download_ui_controller.h',
         'browser/download/drag_download_item.h',
-        'browser/download/drag_download_item_gtk.cc',
         'browser/download/drag_download_item_views.cc',
         'browser/download/save_package_file_picker.cc',
         'browser/download/save_package_file_picker.h',