Add the Copresence API.

components/copresence.gypi

 # Copyright 2014 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.
 
 {
   'targets': [
     {
       'target_name': 'copresence',
       'type': 'static_library',
       'dependencies': [
@@ skipping 17 matching lines @@
         'copresence/handlers/directive_handler.cc',
         'copresence/handlers/directive_handler.h',
         'copresence/mediums/audio/audio_player.cc',
         'copresence/mediums/audio/audio_player.h',
         'copresence/mediums/audio/audio_recorder.cc',
         'copresence/mediums/audio/audio_recorder.h',
         'copresence/public/copresence_client_delegate.h',
         'copresence/public/copresence_client.h',
         'copresence/public/copresence_constants.h',
         'copresence/public/whispernet_client.h',
-        'copresence/rpc/rpc_handler.cc'
+        'copresence/rpc/rpc_handler.cc',
         'copresence/rpc/rpc_handler.h'
         'copresence/timed_map.h',
       ],
       'export_dependent_settings': [
         'copresence_proto',
       ],
     },
     {
       'target_name': 'copresence_test_support',
       'type': 'static_library',
@@ skipping 21 matching lines @@
         'copresence/proto/rpcs.proto',
       ],
       'variables': {
         'proto_in_dir': 'copresence/proto',
         'proto_out_dir': 'components/copresence/proto',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }