make media gallery directory tooltips in media gallery config dialog absolute paths

chrome/browser/ui/gtk/extensions/media_galleries_dialog_gtk.cc

 // Copyright (c) 2012 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/extensions/media_galleries_dialog_gtk.h"
 
 #include "base/auto_reset.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/media_gallery/media_galleries_preferences.h"
 #include "chrome/browser/ui/gtk/gtk_util.h"
@@ skipping 84 matching lines @@
     const MediaGalleryPrefInfo* gallery,
     bool permitted) {
   CheckboxMap::iterator iter = checkbox_map_.find(gallery);
 
   GtkWidget* widget = NULL;
   if (iter != checkbox_map_.end()) {
     widget = iter->second;
   } else {
     widget = gtk_check_button_new_with_label(
         UTF16ToUTF8(gallery->display_name).c_str());
+    gtk_widget_set_tooltip_text(widget,
+        UTF16ToUTF8(gallery->AbsolutePath().LossyDisplayName()).c_str());
     g_signal_connect(widget, "toggled", G_CALLBACK(OnToggledThunk), this);
     gtk_box_pack_start(GTK_BOX(checkbox_container_), widget, FALSE, FALSE, 0);
     gtk_widget_show(widget);
     checkbox_map_[gallery] = widget;
   }
 
   AutoReset<bool> reset(&ignore_toggles_, true);
   gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(widget), permitted);
 }
 
@@ skipping 44 matching lines @@
 
 // MediaGalleriesDialogController ----------------------------------------------
 
 // static
 MediaGalleriesDialog* MediaGalleriesDialog::Create(
     MediaGalleriesDialogController* controller) {
   return new MediaGalleriesDialogGtk(controller);
 }
 
 }  // namespace chrome