After a supervised user has been imported, close overlays.

When successfully importing a supervised user, close both
the supervised user import overlay and the create new
profile overlay.

BUG=343723

Review URL: https://codereview.chromium.org/192573003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255967 0039d316-1c4b-4281-b951-d872f2087c98
Remove additional protection of kDisableAcceleratedVideoDecode in bpf_gpu_policy_linux.cc.

The blacklist is the way we make features available or not. The control of
accelerated video decode should rely on GPU blacklist.

After this CL, Linux and Mac will output following error message when using --ignore-gpu-blacklist.
"[(pid):ERROR:gpu_video_decode_accelerator.cc(303)] Not implemented reached in void 
content::GpuVideoDecodeAccelerator::Initialize(media::VideoCodecProfile, IPC::Message*)
HW video decode acceleration not available."

In addition, match macro style in video_decode_accelerator_unittest.cc
to gpu_video_decode_accelerator.cc

BUG=N/A

Review URL: https://codereview.chromium.org/176883018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255968 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255968