GitLab

This is reland of 10f4b936.
It addressed the issue in capture_unittests.

Original change's description:
> Since blob stream needs higher resolution, it causes higher cpu
loading
> to require higher resolution and resize to smaller resolution.
> In hangout app, we don't need blob stream. Enabling blob stream when
> needed can save a lot of cpu usage.
>
> BUG=b:114676133
> TEST=manually test in apprtc and CCA. make sure picture taking still
> works in CCA.
>
> Change-Id: I9144461bc76627903d0b3b359ce9cf962ff3628c
> Reviewed-on: https://chromium-review.googlesource.com/c/1261242
> Commit-Queue: Heng-ruey Hsu <henryhsu@chromium.org>
> Reviewed-by: Ricky Liang <jcliang@chromium.org>
> Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
> Reviewed-by: Robert Sesek <rsesek@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#601492}

TBR=xhwang@chromium.org,rsesek@chromium.org,jcliang@chromium.org

BUG=b:114676133
TEST=run capture_unittests.

Change-Id: I977a4eade8d7f7ddc6188c4ce4a659d675e89d5f
Reviewed-on: https://chromium-review.googlesource.com/c/1295753Reviewed-by: Heng-ruey Hsu <henryhsu@chromium.org>
Reviewed-by: Ricky Liang <jcliang@chromium.org>
Commit-Queue: Heng-ruey Hsu <henryhsu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#601854}