vpx_codec_vp9x_cx is not used internally. Experimental flag from vp9_extracfg is also not really used. YUV 4:4:4 just works after these changes (you have to specify --profile=1 for the encoder). Change-Id: Ib1c8461d0d19d159827e005efe868f891eea0140
Change-Id: Ib8f8a66c9fd31e508cdc9caa662192f38433aa3d
Change-Id: Ic084c475844b24092a433ab88138cf58af3abbe4