CHANNEL_LAYOUT_2_1  720 content/renderer/renderer_webkitplatformsupport_impl.cc       layout = media::CHANNEL_LAYOUT_2_1;
CHANNEL_LAYOUT_2_1  201 media/base/channel_layout.cc     case CHANNEL_LAYOUT_2_1:
CHANNEL_LAYOUT_2_1  463 media/ffmpeg/ffmpeg_common.cc       return CHANNEL_LAYOUT_2_1;