Code:    MockAudioRendererHost(base::RunLoop* auth_run_loop,
                         int render_process_id,
                         media::AudioManager* audio_manager,
                         AudioMirroringManager* mirroring_manager,
                         MediaStreamManager* media_stream_manager,
                         const std::string& salt)
       : AudioRendererHost(render_process_id,
                           audio_manager,
                           mirroring_manager,
                           media_stream_manager,
                           salt),
        shared_memory_length_(0),
        auth_run_loop_(auth_run_loop) {
    set_render_frame_id_validate_function_for_testing(&ValidateRenderFrameId);
  }

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}
CWE ID: 
   MockAudioRendererHost(base::RunLoop* auth_run_loop,
                         int render_process_id,
                         media::AudioManager* audio_manager,
                        media::AudioSystem* audio_system,
                         AudioMirroringManager* mirroring_manager,
                         MediaStreamManager* media_stream_manager,
                         const std::string& salt)
       : AudioRendererHost(render_process_id,
                           audio_manager,
                          audio_system,
                           mirroring_manager,
                           media_stream_manager,
                           salt),
        shared_memory_length_(0),
        auth_run_loop_(auth_run_loop) {
    set_render_frame_id_validate_function_for_testing(&ValidateRenderFrameId);
  }
