Creating the audio_modem component

components/copresence.gypi

Index: components/copresence.gypi
diff --git a/components/copresence.gypi b/components/copresence.gypi
index 8f776390d98d59575a1ce4bdc7cc25a318ca9706..2aaf6f72256e63daa78bc19598527db3a9838dcf 100644
--- a/components/copresence.gypi
+++ b/components/copresence.gypi
@@ -9,11 +9,9 @@
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
-        '../content/content.gyp:content_common',
-        '../media/media.gyp:media',
-        '../media/media.gyp:shared_memory_support',
         '../net/net.gyp:net',
         '../third_party/webrtc/common_audio/common_audio.gyp:common_audio',
+        'audio_modem',
         'copresence_proto',
       ],
       'include_dirs': [
@@ -21,7 +19,6 @@
       ],
       'sources': [
         # Note: sources list duplicated in GN build.
-        'copresence/copresence_constants.cc',
         'copresence/copresence_manager_impl.cc',
         'copresence/copresence_state_impl.cc',
         'copresence/copresence_state_impl.h',
@@ -40,21 +37,11 @@
         'copresence/handlers/gcm_handler.h',
         'copresence/handlers/gcm_handler_impl.cc',
         'copresence/handlers/gcm_handler_impl.h',
-        'copresence/mediums/audio/audio_manager.h',
-        'copresence/mediums/audio/audio_manager_impl.cc',
-        'copresence/mediums/audio/audio_manager_impl.h',
-        'copresence/mediums/audio/audio_player.h',
-        'copresence/mediums/audio/audio_player_impl.cc',
-        'copresence/mediums/audio/audio_player_impl.h',
-        'copresence/mediums/audio/audio_recorder.h',
-        'copresence/mediums/audio/audio_recorder_impl.cc',
-        'copresence/mediums/audio/audio_recorder_impl.h',
         'copresence/public/copresence_constants.h',
         'copresence/public/copresence_delegate.h',
         'copresence/public/copresence_manager.h',
         'copresence/public/copresence_observer.h',
         'copresence/public/copresence_state.h',
-        'copresence/public/whispernet_client.h',
         'copresence/rpc/http_post.cc',
         'copresence/rpc/http_post.h',
         'copresence/rpc/rpc_handler.cc',
@@ -77,12 +64,8 @@
         '..',
       ],
       'sources': [
-        'copresence/test/audio_test_support.cc',
-        'copresence/test/audio_test_support.h',
         'copresence/test/fake_directive_handler.cc',
         'copresence/test/fake_directive_handler.h',
-        'copresence/test/stub_whispernet_client.cc',
-        'copresence/test/stub_whispernet_client.h',
       ],
       'export_dependent_settings': [
         'copresence_proto',