Load balancing.

Just noticed this one. I would ask Owen for more details then.

https://codereview.chromium.org/2506363003/
CL is waiting for the review of the owner of histograms.xml. Didn't hear from him for a couple days (Thanksgiving maybe), will ping him today.

Johny. Does histograms.xml have another OWNER you can add?

I have added another owner to review also.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9448e050e5d0ba0862b23438b8ebcd61c756dac2

commit 9448e050e5d0ba0862b23438b8ebcd61c756dac2
Author: johnylin <johnylin@chromium.org>
Date: Tue Nov 29 03:55:43 2016

Add Media.ArcGpuVideoDecodeAccelerator.InitializeResult to histograms

This enum result is recorded for verifying HW codec is used on ARC++,
or if there is any initialization error.

BUG= 661864 
TEST=test it on Elm and make sure the flag shows correct value in
chrome://histograms/Media.ArcGpuVideoDecodeAccelerator.InitializeResult

Review-Url: https://codereview.chromium.org/2506363003
Cr-Commit-Position: refs/heads/master@{#434880}

[modify] https://crrev.com/9448e050e5d0ba0862b23438b8ebcd61c756dac2/chrome/gpu/arc_gpu_video_decode_accelerator.cc
[modify] https://crrev.com/9448e050e5d0ba0862b23438b8ebcd61c756dac2/chrome/gpu/arc_gpu_video_decode_accelerator.h
[modify] https://crrev.com/9448e050e5d0ba0862b23438b8ebcd61c756dac2/chrome/gpu/arc_video_accelerator.h
[modify] https://crrev.com/9448e050e5d0ba0862b23438b8ebcd61c756dac2/tools/metrics/histograms/histograms.xml

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/c061a5e08bd5e9da0ec7911bc8efb06c4ac23610

commit c061a5e08bd5e9da0ec7911bc8efb06c4ac23610
Author: Owen Lin <owenlin@google.com>
Date: Fri Dec 30 06:46:29 2016

cros/video: Add constants for AGVDA histogram.

This entry is used to detect the HW video decoder is requested from
ARC containers and is successfully initialized.

Test=Run the cheets_mediaPlayerVideoHWDecodeUsed tests.
Bug= chromium:661864 

Change-Id: Ibe45525d0edc2232c017a75dbe9e5c59f36ccc49
Reviewed-on: https://chromium-review.googlesource.com/424514
Commit-Ready: Owen Lin <owenlin@chromium.org>
Tested-by: Owen Lin <owenlin@chromium.org>
Reviewed-by: Owen Lin <owenlin@chromium.org>

[modify] https://crrev.com/c061a5e08bd5e9da0ec7911bc8efb06c4ac23610/client/cros/video/constants.py

While playing youtube video, we've observed "Media.ChromeArcVideoDecodeAccelerator.InitializeResult" in histogram list, But as per above CL, it is expecting to have "Media.ArcGpuVideoDecodeAccelerator.InitializeResult", 
Is there anything we're missing while testing the histogram.

Classes were refactored afterwards as well as histogram name.
Please see this CL:
https://codereview.chromium.org/2928343002/

Thanks

Thanks!