Remove dependency on AudioStub in ConnectionToClient

remoting/remoting_host_srcs.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.
 
 {
   'variables': {
     'remoting_host_sources': [
       'host/audio_capturer.cc',
       'host/audio_capturer.h',
       'host/audio_capturer_android.cc',
       'host/audio_capturer_linux.cc',
       'host/audio_capturer_linux.h',
       'host/audio_capturer_mac.cc',
       'host/audio_capturer_win.cc',
       'host/audio_capturer_win.h',
-      'host/audio_pump.cc',
-      'host/audio_pump.h',
       'host/audio_silence_detector.cc',
       'host/audio_silence_detector.h',
       'host/backoff_timer.cc',
       'host/backoff_timer.h',
       'host/basic_desktop_environment.cc',
       'host/basic_desktop_environment.h',
       'host/branding.cc',
       'host/branding.h',
       'host/chromeos/aura_desktop_capturer.cc',
       'host/chromeos/aura_desktop_capturer.h',
@@ skipping 319 matching lines @@
       'host/it2me/it2me_confirmation_dialog_chromeos.cc',
       'host/it2me/it2me_confirmation_dialog_proxy.cc',
       'host/it2me/it2me_confirmation_dialog_proxy.h',
       'host/it2me/it2me_host.cc',
       'host/it2me/it2me_host.h',
       'host/it2me/it2me_native_messaging_host.cc',
       'host/it2me/it2me_native_messaging_host.h',
     ],
   }
 }