BrowserMediaPlayerManager manages MediaKeys objects.

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 1576 matching lines @@
             'jni_generator_ptr_type': 'long',
           },
           'includes': ['../build/jni_generator.gypi'],
         },
         {
           'target_name': 'player_android',
           'type': 'static_library',
           'sources': [
             'base/android/audio_decoder_job.cc',
             'base/android/audio_decoder_job.h',
+            'base/android/cdm_factory.h',
+            'base/android/cdm_factory_android.cc',
             'base/android/media_codec_bridge.cc',
             'base/android/media_codec_bridge.h',
             'base/android/media_decoder_job.cc',
             'base/android/media_decoder_job.h',
             'base/android/media_drm_bridge.cc',
             'base/android/media_drm_bridge.h',
             'base/android/media_jni_registrar.cc',
             'base/android/media_jni_registrar.h',
             'base/android/media_player_android.cc',
             'base/android/media_player_android.h',
@@ skipping 99 matching lines @@
                   ],
                 }],
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }