Code:  AudioOutputAuthorizationHandler::AudioOutputAuthorizationHandler(
    media::AudioManager* audio_manager,
     MediaStreamManager* media_stream_manager,
     int render_process_id,
     const std::string& salt)
    : audio_manager_(audio_manager),
       media_stream_manager_(media_stream_manager),
       permission_checker_(base::MakeUnique<MediaDevicesPermissionChecker>()),
       render_process_id_(render_process_id),
      salt_(salt),
      weak_factory_(this) {
  DCHECK(media_stream_manager_);
}

Vulnerability Type: DoS 
CWE ID: 
Summary: Multiple unspecified vulnerabilities in Google Chrome before 43.0.2357.65 allow attackers to cause a denial of service or possibly have other impact via unknown vectors.
Commit Message: Switching AudioOutputAuthorizationHandler from using AudioManager interface to AudioSystem one.

BUG=672468
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2692203003
Cr-Commit-Position: refs/heads/master@{#450939}