Clean up download code:

chrome/browser/gtk/tab_contents_drag_source.cc

 // Copyright (c) 2009 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/gtk/tab_contents_drag_source.h"
 
 #include <string>
 
 #include "app/gtk_dnd_util.h"
 #include "base/file_util.h"
 #include "base/mime_util.h"
 #include "base/utf_string_conversions.h"
-#include "chrome/browser/download/download_manager.h"
+#include "chrome/browser/download/download_util.h"
 #include "chrome/browser/download/drag_download_file.h"
 #include "chrome/browser/download/drag_download_util.h"
 #include "chrome/browser/gtk/gtk_util.h"
 #include "chrome/browser/renderer_host/render_view_host.h"
 #include "chrome/browser/renderer_host/render_view_host_delegate.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/tab_contents/tab_contents_view.h"
 #include "gfx/gtk_util.h"
 #include "net/base/file_stream.h"
 #include "net/base/net_util.h"
@@ skipping 263 matching lines @@
 }
 
 void TabContentsDragSource::OnDragBegin(GtkWidget* sender,
                                         GdkDragContext* drag_context) {
   if (!download_url_.is_empty()) {
     // Generate the file name based on both mime type and proposed file name.
     std::string download_mime_type = UTF16ToUTF8(wide_download_mime_type_);
     std::string content_disposition("attachment; filename=");
     content_disposition += download_file_name_.value();
     FilePath generated_download_file_name;
-    DownloadManager::GenerateFileName(download_url_,
-                                      content_disposition,
-                                      std::string(),
-                                      download_mime_type,
-                                      &generated_download_file_name);
+    download_util::GenerateFileName(download_url_,
+                                    content_disposition,
+                                    std::string(),
+                                    download_mime_type,
+                                    &generated_download_file_name);
 
     // Pass the file name to the drop target by setting the source window's
     // XdndDirectSave0 property.
     gdk_property_change(drag_context->source_window,
                         gtk_dnd_util::GetAtomForTarget(
                             gtk_dnd_util::DIRECT_SAVE_FILE),
                         gtk_dnd_util::GetAtomForTarget(
                             gtk_dnd_util::TEXT_PLAIN_NO_CHARSET),
                         8,
                         GDK_PROP_MODE_REPLACE,
@@ skipping 58 matching lines @@
   cairo_t* cr = gdk_cairo_create(event->window);
   gdk_cairo_rectangle(cr, &event->area);
   cairo_clip(cr);
   cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
   gdk_cairo_set_source_pixbuf(cr, drag_pixbuf_, 0, 0);
   cairo_paint(cr);
   cairo_destroy(cr);
 
   return TRUE;
 }