Pass correct dummy filename ("name.html" instead of "name./html") to GTK MIME...

chrome/browser/ui/gtk/dialogs_gtk.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 <gtk/gtk.h>
 #include <map>
 #include <set>
 
 #include "app/gtk_signal.h"
 #include "app/l10n_util.h"
@@ skipping 248 matching lines @@
 }
 
 void SelectFileDialogImpl::AddFilters(GtkFileChooser* chooser) {
   for (size_t i = 0; i < file_types_.extensions.size(); ++i) {
     GtkFileFilter* filter = NULL;
     for (size_t j = 0; j < file_types_.extensions[i].size(); ++j) {
       if (!file_types_.extensions[i][j].empty()) {
         if (!filter)
           filter = gtk_file_filter_new();
         std::string mime_type = mime_util::GetFileMimeType(
-            FilePath("name.").Append(file_types_.extensions[i][j]));
+            FilePath("name").ReplaceExtension(file_types_.extensions[i][j]));
         gtk_file_filter_add_mime_type(filter, mime_type.c_str());
       }
     }
     // We didn't find any non-empty extensions to filter on.
     if (!filter)
       continue;
 
     // The description vector may be blank, in which case we are supposed to
     // use some sort of default description based on the filter.
     if (i < file_types_.extension_description_overrides.size()) {
       gtk_file_filter_set_name(filter, UTF16ToUTF8(
           file_types_.extension_description_overrides[i]).c_str());
     } else {
       // There is no system default filter description so we use
       // the MIME type itself if the description is blank.
       std::string mime_type = mime_util::GetFileMimeType(
-          FilePath("name.").Append(file_types_.extensions[i][0]));
+          FilePath("name").ReplaceExtension(file_types_.extensions[i][0]));
       gtk_file_filter_set_name(filter, mime_type.c_str());
     }
 
     gtk_file_chooser_add_filter(chooser, filter);
     if (i == file_type_index_ - 1)
       gtk_file_chooser_set_filter(chooser, filter);
   }
 
   // Add the *.* filter, but only if we have added other filters (otherwise it
   // is implied).
@@ skipping 281 matching lines @@
   GdkPixbuf* pixbuf = gdk_pixbuf_new_from_file_at_size(filename, kPreviewWidth,
                                                        kPreviewHeight, NULL);
   g_free(filename);
   if (pixbuf) {
     gtk_image_set_from_pixbuf(GTK_IMAGE(preview_), pixbuf);
     g_object_unref(pixbuf);
   }
   gtk_file_chooser_set_preview_widget_active(GTK_FILE_CHOOSER(chooser),
                                              pixbuf ? TRUE : FALSE);
 }