UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36

Example URL:

Steps to reproduce the problem:
1. play video on youtube
2. run 'top' to check the useage or  chrome://gpu show the "Video Decode" ....etc
3. 

What is the expected behavior?
 chrome://gpu show the "Video Decode" is hardware acceleration or the play video is faster with hard-decode.

What went wrong?
There are some error log as below:

[934:934:0124/071620.871683:ERROR:gl_surface_egl.cc(294)] : eglChooseConfig failed with error EGL_BAD_ATTRIBUTE[934:934:0124/071620.888112:ERROR:sandbox_linux.cc(351)] : InitializeSandbox() called with multiple threads in process gpu-process.[934:934:0124/071621.203868:ERROR:gl_surface_egl.cc(294)] : eglChooseConfig failed with error EGL_BAD_ATTRIBUTE
...

Did this work before? N/A 

Is it a problem with Flash or HTML5? N/A

Does this work in other browsers? N/A

Chrome version: 63.0.3239.132  Channel: stable
OS Version: 4.4.103
Flash Version: 

Contents of chrome://gpu: 
Graphics Feature Status
Canvas: Hardware accelerated
CheckerImaging: Disabled
Flash: Hardware accelerated
Flash Stage3D: Hardware accelerated
Flash Stage3D Baseline profile: Hardware accelerated
Compositing: Hardware accelerated
Multiple Raster Threads: Disabled
Native GpuMemoryBuffers: Software only. Hardware acceleration disabled
Rasterization: Software only. Hardware acceleration disabled
Video Decode: Software only, hardware acceleration unavailable
Video Encode: Software only, hardware acceleration unavailableWebGL: Hardware acceleratedWebGL2: Hardware accelerated

Build the chromium with the gn configure.

Says:
gn gen out/Default --args='target_os="linux" target_cpu="arm" is_component_build = false is_component_ffmpeg = true
is_debug = false symbol_level = 0 enable_nacl = true remove_webcore_debug_symbols = true enable_linux_installer = true'

Then installed on debian/ubuntu os.

How to do it for working?