Separate MediaKeys interface from Decryptor interface.

media/media.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
     # Override to dynamically link the cras (ChromeOS audio) library.
     'use_cras%': 0,
     # Option e.g. for Linux distributions to link pulseaudio directly
@@ skipping 244 matching lines @@
         'base/demuxer.cc',
         'base/demuxer.h',
         'base/demuxer_stream.cc',
         'base/demuxer_stream.h',
         'base/djb2.cc',
         'base/djb2.h',
         'base/filter_collection.cc',
         'base/filter_collection.h',
         'base/media.cc',
         'base/media.h',
+        'base/media_keys.cc',
+        'base/media_keys.h',
         'base/media_log.cc',
         'base/media_log.h',
         'base/media_log_event.h',
         'base/media_posix.cc',
         'base/media_switches.cc',
         'base/media_switches.h',
         'base/media_win.cc',
         'base/multi_channel_resampler.cc',
         'base/multi_channel_resampler.h',
         'base/pipeline.cc',
@@ skipping 1445 matching lines @@
           ],
           'sources': [
             'base/simd/sinc_resampler_sse.cc',
             'base/simd/vector_math_sse.cc',
           ],
         }, # end of target media_sse
       ],
     }],
   ],
 }