VaAPI: Limit |use_reduced_number_of_allocations_| to certain platforms

|use_reduced_number_of_allocations_| regressed a couple of performance
tests on old-ish CrOs platforms like Broadwell and Haswell (see newest
bug). This CL limits the use of said operational mode to SkyLake and

FTR the CL that caused the regression is

Bug: 912295, 920510
Change-Id: Idb0a820bee3a714742af580e4ba7a0ea132a08ee
Reviewed-by: Hirokazu Honda <>
Commit-Queue: Miguel Casas <>
Cr-Commit-Position: refs/heads/master@{#625688}
1 file changed