Add CdmService to keep track of CDMs

content/content_common.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',
     '../cc/cc.gyp:cc',
     '../components/tracing.gyp:tracing',
     '../device/bluetooth/bluetooth.gyp:device_bluetooth',
@@ skipping 92 matching lines @@
       'public/common/color_suggestion.cc',
       'public/common/color_suggestion.h',
       'public/common/common_param_traits.cc',
       'public/common/common_param_traits.h',
       'public/common/common_param_traits_macros.h',
       'public/common/console_message_level.h',
       'public/common/content_client.cc',
       'public/common/content_client.h',
       'public/common/content_constants.cc',
       'public/common/content_constants.h',
+      'public/common/content_decryption_module_registration.h',
+      'public/common/content_decryption_module_service.h',
       'public/common/content_descriptors.h',
       'public/common/content_features.cc',
       'public/common/content_features.h',
       'public/common/content_ipc_logging.h',
       'public/common/content_paths.h',
       'public/common/content_switches.cc',
       'public/common/content_switches.h',
       'public/common/context_menu_params.cc',
       'public/common/context_menu_params.h',
       'public/common/drop_data.cc',
@@ skipping 366 matching lines @@
       'common/mac/attributed_string_coder.mm',
       'common/mac/font_descriptor.h',
       'common/mac/font_descriptor.mm',
       'common/mac/font_loader.h',
       'common/mac/font_loader.mm',
       'common/manifest_manager_messages.h',
       'common/media/aec_dump_messages.h',
       'common/media/audio_messages.h',
       'common/media/cdm_messages.h',
       'common/media/cdm_messages_enums.h',
+      'common/media/content_decryption_module_registration.cc',
+      'common/media/content_decryption_module_service.cc',
       'common/media/media_param_traits.cc',
       'common/media/media_param_traits.h',
       'common/media/media_player_delegate_messages.h',
       'common/media/media_player_messages_android.h',
       'common/media/media_session_messages_android.h',
       'common/media/media_stream_messages.h',
       'common/media/media_stream_options.cc',
       'common/media/media_stream_options.h',
       'common/media/media_stream_track_metrics_host_messages.h',
       'common/media/midi_messages.h',
@@ skipping 588 matching lines @@
         'common/gpu/client/gpu_memory_buffer_impl_ozone.cc',
         'common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc',
         'common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.h',
         'common/gpu/gpu_memory_buffer_factory_ozone.cc',
         'common/gpu/gpu_memory_buffer_factory_ozone_native_pixmap.cc',
         'common/gpu/gpu_memory_buffer_factory_ozone_native_pixmap.h',
       ],
     }],
   ],
 }