Enable resource prefetch from the browser process.

chrome/chrome_renderer.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'renderer',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 194 matching lines @@
         'renderer/pepper/pepper_shared_memory_message_filter.cc',
         'renderer/pepper/pepper_shared_memory_message_filter.h',
         'renderer/pepper/pepper_uma_host.cc',
         'renderer/pepper/pepper_uma_host.h',
         'renderer/pepper/ppb_pdf_impl.cc',
         'renderer/pepper/ppb_pdf_impl.h',
         'renderer/plugins/chrome_plugin_placeholder.cc',
         'renderer/plugins/chrome_plugin_placeholder.h',
         'renderer/plugins/plugin_uma.cc',
         'renderer/plugins/plugin_uma.h',
+        'renderer/prefetch_helper.cc',
+        'renderer/prefetch_helper.h',
         'renderer/prerender/prerender_dispatcher.cc',
         'renderer/prerender/prerender_dispatcher.h',
         'renderer/prerender/prerender_extra_data.cc',
         'renderer/prerender/prerender_extra_data.h',
         'renderer/prerender/prerender_helper.cc',
         'renderer/prerender/prerender_helper.h',
         'renderer/prerender/prerender_media_load_deferrer.cc',
         'renderer/prerender/prerender_media_load_deferrer.h',
         'renderer/prerender/prerenderer_client.cc',
         'renderer/prerender/prerenderer_client.h',
@@ skipping 170 matching lines @@
         }],
         ['enable_printing!=0', {
           'dependencies': [
             '../printing/printing.gyp:printing',
           ],
         }],
       ],
     },
   ],
 }