Added histogram for DXVA VDA D3D11 usage.

Adds a UMA for how often the DXVA VDA uses D3D11 vs D3D9.  THe goal
is to see how the D3D11VideoDecoder affects D3D11 usage by the VDA.

Change-Id: Ie54ec85ba279d9d4daa3926006f33782c5c7cc6b
Reviewed-on: https://chromium-review.googlesource.com/c/1427786
Commit-Queue: Frank Liberato <liberato@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Dan Sanders <sandersd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625021}
3 files changed