Delete empty API files and cleaned up includes.

webrtc/media/media.gyp

 # Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 {
   'includes': [ '../build/common.gypi', ],
@@ skipping 15 matching lines @@
         '<(webrtc_root)/p2p/p2p.gyp:rtc_p2p',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '<(libyuv_dir)/include',
         ],
       },
       'sources': [
         'base/audioframe.h',
         'base/audiosource.h',
-        'base/capturemanager.cc',
-        'base/capturemanager.h',
         'base/codec.cc',
         'base/codec.h',
         'base/cpuid.cc',
         'base/cpuid.h',
         'base/cryptoparams.h',
         'base/device.h',
         'base/fakescreencapturerfactory.h',
         'base/hybriddataengine.h',
         'base/mediachannel.h',
         'base/mediacommon.h',
@@ skipping 161 matching lines @@
         }],
         ['OS=="ios" or (OS=="mac" and target_arch!="ia32")', {
           'defines': [
             'CARBON_DEPRECATED=YES',
           ],
         }],
       ],
     },  # target rtc_media
   ],  # targets.
 }