The updates in this CL are for the scenario when ext-comp-refs is off.

For --disable-global-motion --disable-ext-tx --disable-ext-comp-refs
--disable-convolve-round, the patch obtains a small BDRate gain for
PSNR: lowres -0.08%; midres -0.05%

Change-Id: I47d1ba93318e2904b5714f62ffd6af056f4eb588