Fix bug 79905: Drag and drop of "DownloadURL" type ignores specified filename for data URLs.

chrome/browser/ui/gtk/tab_contents_drag_source.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 "chrome/browser/ui/gtk/tab_contents_drag_source.h"
 
 #include <string>
 
 #include "base/file_util.h"
 #include "base/mime_util.h"
@@ skipping 273 matching lines @@
   }
 
   // Let the native failure animation run.
   return FALSE;
 }
 
 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;
-    download_util::GenerateFileName(download_url_,
-                                    content_disposition,
-                                    std::string(),
-                                    download_mime_type,
-                                    &generated_download_file_name);
+    download_util::GenerateFileNameFromSuggestedName(
+        download_url_,
+        download_file_name_.value(),
+        UTF16ToUTF8(wide_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,
                         ui::GetAtomForTarget(ui::DIRECT_SAVE_FILE),
                         ui::GetAtomForTarget(ui::TEXT_PLAIN_NO_CHARSET),
                         8,
                         GDK_PROP_MODE_REPLACE,
                         reinterpret_cast<const guchar*>(
                             generated_download_file_name.value().c_str()),
@@ 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;
 }