Code: void AudioOutputAuthorizationHandler::GetDeviceParameters(
    AuthorizationCompletedCallback cb,
     const std::string& raw_device_id) const {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   DCHECK(!raw_device_id.empty());
  base::PostTaskAndReplyWithResult(
      audio_manager_->GetTaskRunner(), FROM_HERE,
      base::Bind(&GetDeviceParametersOnDeviceThread,
                 base::Unretained(audio_manager_), raw_device_id),
       base::Bind(&AudioOutputAuthorizationHandler::DeviceParametersReceived,
                  weak_factory_.GetWeakPtr(), std::move(cb), false,
                  raw_device_id));
}

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}