Revert 111519 - Remove default plug-in on Mac, Gtk and Aura.

chrome/default_plugin/default_plugin.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../../build/win_precompile.gypi',
@@ skipping 11 matching lines @@
         '<(DEPTH)/third_party/libxml/libxml.gyp:libxml',
         '<(DEPTH)/third_party/npapi/npapi.gyp:npapi',
         '<(DEPTH)/webkit/support/webkit_support.gyp:webkit_resources',
         '<(DEPTH)/webkit/support/webkit_support.gyp:webkit_strings',
       ],
       'include_dirs': [
         '<(DEPTH)',
         '<(DEPTH)/third_party/wtl/include',
       ],
       'sources': [
+        'plugin_impl_aura.cc',
+        'plugin_impl_aura.h',
+        'plugin_impl_gtk.cc',
+        'plugin_impl_gtk.h',
+        'plugin_impl_mac.h',
+        'plugin_impl_mac.mm',
         'plugin_impl_win.cc',
         'plugin_impl_win.h',
         'plugin_installer_base.cc',
         'plugin_installer_base.h',
         'plugin_main.cc',
         'plugin_main.h',
       ],
       'conditions': [
         ['OS=="win"', {
           'link_settings': {
@@ skipping 30 matching lines @@
           'variables': {
             'grit_grd_file': 'default_plugin_resources.grd',
           },
           'includes': [ '../../build/grit_action.gypi' ],
         },
       ],
       'includes': [ '../../build/grit_target.gypi' ],
     },
   ],
 }