Enable NEON for ChromeOS devices
Enable NEON for ChromeOS devices

Chrome uses openh264 to encode video frames for MediaRecorder APIs.
However, on ChromeOS, the encoding procedure is run in renderer process,
which can not access /proc/cpuinfo, making NEON not available.

Since all arm-based ChromeOS devices have NEON, it can be marked as
enabled anyway.

sijchen/openh264,shihuade/openh264,ruil2/openh264,mstorsjo/openh264,cisco/openh264,GuangweiWang/openh264,ruil2/openh264,shihuade/openh264,GuangweiWang/openh264,cisco/openh264,ruil2/openh264,cisco/openh264,GuangweiWang/openh264,sijchen/openh264,cisco/openh264,mstorsjo/openh264,cisco/openh264,sijchen/openh264,mstorsjo/openh264,shihuade/openh264,sijchen/openh264,sijchen/openh264,mstorsjo/openh264,cisco/openh264,shihuade/openh264,GuangweiWang/openh264,shihuade/openh264,GuangweiWang/openh264,GuangweiWang/openh264,mstorsjo/openh264,sijchen/openh264,shihuade/openh264,cisco/openh264,mstorsjo/openh264,sijchen/openh264,ruil2/openh264,ruil2/openh264,ruil2/openh264,mstorsjo/openh264,GuangweiWang/openh264,ruil2/openh264,shihuade/openh264