commit ca3e63ed304404342e689532cc0d2148a57767c1
author Hirokazu Honda <hiroh@chromium.org> Thu Jan 17 10:25:23 2019
committer Commit Bot <commit-bot@chromium.org> Thu Jan 17 10:25:23 2019
tree b949821c9d930f014a8e3fb74433ca6e278921ac
parent b698fe3f0465419062e66a7630a0f748eee37e01

media/gpu/v4l2: Make V4L2VDA a MemoryDumpProvider

This makes V4L2VideoDecodeAccelerator a MemoryDumpProvider. Thanks to it, we can
see the memory usage of V4L2VDA in chrome://tracing in enabling memory-infra.
V4L2VDA reports the following memory usage as its usage;
* the size of MMAP buffers in VIDIOC_OUTPUT queue,
* the size of MMAP buffers in VIDIOC_CAPTURE queue,
and also reports the additional information,
* the number of any memory type buffers in VIDIOC_OUTPUT queue,
* the memory type of buffers in VIDIOC_OUTPUT queue,
* the number of any memory type buffers in VIDIOC_CAPTURE queue, and
* the memory type of buffers in VIDIOC_CAPTURE queue.

Screen shot of chrome://tracing: https://imgur.com/a/Wc97koz

Bug: 721674
Test: chrome://tracing memory usage of V4L2VDA when video plays on hana

Change-Id: I9227ccf3fab821341dac14d72a3fdc40f40c5afd
Reviewed-on: https://chromium-review.googlesource.com/c/1390780
Commit-Queue: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Alexandre Courbot <acourbot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623630}