remove vp8 unused uvstride parm in simple loop filter

Change-Id: I35fac6c0db327ef81852f326a93878b57cb2def4
Resolve several style issues in decode_perf_test

This allows us to track decode speed for new encodes so that we catch
problems like an encode change that makes decode really slow.

Change-Id: I7210196415c4e53d455e9c81246d9fb324913a06
Merge "remove vp8 unused uvstride parm in simple loop filter"
Merge "Resolve several style issues in decode_perf_test"