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This CL adds a |min_resolution| field to VideoEncodeAcceleratorSupportedProfile
and propagates it from its source(s) in the GPU process, via the |gpu_info|
mojom interface definition, to its ultimate users: MediaRecorder and
RTCVideoEncoder (the latter is used for WebRTC's PeerConnection).

This new field is populated from VaapiWrapper to indicate that we should not
use it for small resolutions (currently 320x240); software encoding should
be used instead.

This CL also wires this new field in the chrome:gpu informational UI.

TEST=https://codepen.io/miguelao/pen/wzVMJb on nocturne (pixel slate),
enable logging and verify that MediaRecorder doesn't use the encode accelerator,
e.g. for 320x240 camera capture.

Bug: 1008491
Change-Id: Ifb19232ca5a5bbbde0ba42e1c28de72e46dafc5c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1828078
Commit-Queue: Miguel Casas <mcasas@chromium.org>
Reviewed-by: Guido Urdaneta <guidou@chromium.org>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Dan Sanders <sandersd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#704018}