Force inclusion of build/common.gypi for all chromium gyp files.

third_party/ffmpeg/ffmpeg.gyp

 # Copyright (c) 2009 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.
 
 {
-  'includes': [
-    '../../build/common.gypi',
-  ],
   'target_defaults': {
     'conditions': [
       ['OS!="linux" and OS!="freebsd"', {'sources/': [['exclude', '/linux/']]}],
       ['OS!="mac"', {'sources/': [['exclude', '/mac/']]}],
       ['OS!="win"', {'sources/': [['exclude', '/win/']]}],
     ],
   },
   'variables': {
     # Allow overridding the selection of which ffmpeg binaries to copy via an
     # environment variable.  Affects the ffmpeg_binaries target.
@@ skipping 212 matching lines @@
         {
           'destination': '<(PRODUCT_DIR)/',
           'files': [
             '<@(source_files)',
           ]
         },
       ],
     },
   ],
 }