Turn FileDescriptorInfo a collection class

content/content_browser.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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
     '../net/net.gyp:net',
@@ skipping 103 matching lines @@
       'public/browser/download_manager.h',
       'public/browser/download_manager_delegate.cc',
       'public/browser/download_manager_delegate.h',
       'public/browser/download_save_info.cc',
       'public/browser/download_save_info.h',
       'public/browser/download_url_parameters.cc',
       'public/browser/download_url_parameters.h',
       'public/browser/favicon_status.cc',
       'public/browser/favicon_status.h',
       'public/browser/file_descriptor_info.h',
+      'public/browser/file_descriptor_info.cc',
       'public/browser/font_list_async.h',
       'public/browser/geolocation_provider.h',
       'public/browser/global_request_id.h',
       'public/browser/gpu_data_manager.h',
       'public/browser/gpu_data_manager_observer.h',
       'public/browser/histogram_fetcher.h',
       'public/browser/host_zoom_map.h',
       'public/browser/indexed_db_context.h',
       'public/browser/indexed_db_info.cc',
       'public/browser/indexed_db_info.h',
@@ skipping 1749 matching lines @@
       'sources': [
         'browser/media/cdm/browser_cdm_manager.cc',
         'browser/media/cdm/browser_cdm_manager.h',
         # This works on Android because enable_browser_cdms==1 on Android.
         'browser/media/media_web_contents_observer.cc',
         'browser/media/media_web_contents_observer.h',
       ],
     }],
   ],
 }