linux_aura: Use system configuration for middle clicking the titlebar.

chrome/browser/ui/libgtk2ui/libgtk2ui.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 27 matching lines @@
       # in a non-gtk build.
       'sources': [
         'app_indicator_icon.cc',
         'app_indicator_icon.h',
         'chrome_gtk_frame.cc',
         'chrome_gtk_frame.h',
         'chrome_gtk_menu_subclasses.cc',
         'chrome_gtk_menu_subclasses.h',
         'g_object_destructor_filo.cc',
         'g_object_destructor_filo.h',
-        'gconf_titlebar_listener.cc',
-        'gconf_titlebar_listener.h',
+        'gconf_listener.cc',
+        'gconf_listener.h',
         'gtk2_border.cc',
         'gtk2_border.h',
         'gtk2_event_loop.cc',
         'gtk2_event_loop.h',
         'gtk2_key_bindings_handler.cc',
         'gtk2_key_bindings_handler.h',
         'gtk2_signal_registrar.cc',
         'gtk2_signal_registrar.h',
         'gtk2_ui.cc',
         'gtk2_ui.h',
@@ skipping 25 matching lines @@
         ['use_gconf==0', {
           'sources!': [
             'gconf_titlebar_listener.cc',
             'gconf_titlebar_listener.h',
           ],
         }],
       ],
     },
   ],
 }