NOT FOR SUBMISSION: Enable FFmpeg on Android.

ffmpeg.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.
 
 # There's a couple key GYP variables that control how FFmpeg is built:
 #   ffmpeg_branding
 #     Controls whether we build the Chromium or Google Chrome version of
 #     FFmpeg.  The Google Chrome version contains additional codecs.
 #     Typical values are Chromium, Chrome, ChromiumOS, and ChromeOS.
 #   use_system_ffmpeg
@@ skipping 40 matching lines @@
         ],
       }],
       ['OS == "mac" or OS == "win" or OS == "openbsd"', {
         'os_config%': '<(OS)',
       }, {  # all other Unix OS's use the linux config
         'os_config%': 'linux',
       }],
       ['chromeos == 1', {
         'ffmpeg_branding%': '<(branding)OS',
       }, {  # otherwise, assume Chrome/Chromium.
-        'ffmpeg_branding%': '<(branding)',
+        'ffmpeg_branding%': 'Chrome',
       }],
     ],
 
     'ffmpeg_variant%': '<(target_arch)',
 
     'use_system_ffmpeg%': 0,
     'build_ffmpegsumo%': 1,
 
     # Locations for generated artifacts.
     'shared_generated_dir': '<(SHARED_INTERMEDIATE_DIR)/third_party/ffmpeg',
@@ skipping 579 matching lines @@
           '-I', '.',
           # Disable warnings, prevents log spam for things we won't fix.
           '-w',
           '-P', 'config.asm',
         ],
         'yasm_output_path': '<(shared_generated_dir)/yasm'
       },
     },
   ],  # targets
 }