The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/96c9b34ea924ed4300f90839cab36adf4f8eaecc

commit 96c9b34ea924ed4300f90839cab36adf4f8eaecc
Author: braveyao <braveyao@chromium.org>
Date: Tue Apr 25 18:23:19 2017

Android: enable HW encoding

Android video encode accelerator was disabled based on gpu blacklist since
the day it's born, as in https://codereview.chromium.org/74563002/#ps330001.
We have tweaked the encoding codes on Android a bit. Now H264 has been
enabled by default for WebRTC calls. And VP8&H264 are enabled for MediaRecorder
too recently. Both are done by bypassing the blacklist.
So it's time to enable HW encoding on Android.

This CL is to revert the PS#3 of https://codereview.chromium.org/74563002,
as removing the entry in gpu blacklist to enable HW encoing on Android.
And add a flag to keep VP8 disabled for WebRTC for now.

BUG= 709118 
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2839823002
Cr-Commit-Position: refs/heads/master@{#467050}

[modify] https://crrev.com/96c9b34ea924ed4300f90839cab36adf4f8eaecc/chrome/browser/about_flags.cc
[modify] https://crrev.com/96c9b34ea924ed4300f90839cab36adf4f8eaecc/chrome/browser/flag_descriptions.cc
[modify] https://crrev.com/96c9b34ea924ed4300f90839cab36adf4f8eaecc/chrome/browser/flag_descriptions.h
[modify] https://crrev.com/96c9b34ea924ed4300f90839cab36adf4f8eaecc/content/browser/gpu/gpu_data_manager_impl_private.cc
[modify] https://crrev.com/96c9b34ea924ed4300f90839cab36adf4f8eaecc/content/public/browser/gpu_utils.cc
[modify] https://crrev.com/96c9b34ea924ed4300f90839cab36adf4f8eaecc/content/public/common/content_features.cc
[modify] https://crrev.com/96c9b34ea924ed4300f90839cab36adf4f8eaecc/content/public/common/content_features.h
[modify] https://crrev.com/96c9b34ea924ed4300f90839cab36adf4f8eaecc/content/public/common/content_switches.cc
[modify] https://crrev.com/96c9b34ea924ed4300f90839cab36adf4f8eaecc/content/public/common/content_switches.h
[modify] https://crrev.com/96c9b34ea924ed4300f90839cab36adf4f8eaecc/content/renderer/media/gpu/rtc_video_encoder_factory.cc
[modify] https://crrev.com/96c9b34ea924ed4300f90839cab36adf4f8eaecc/gpu/config/software_rendering_list.json
[modify] https://crrev.com/96c9b34ea924ed4300f90839cab36adf4f8eaecc/tools/metrics/histograms/histograms.xml