I can't reproduce this on my Pixel 2, looking at trying on other devices. I wonder if there is a difference in shared memory behavior on older Android versions because the symptoms do seem so similar to  issue 805146 .

I tested it on Nexus 5, Nexus 7, and Pixel C, and can't reproduce this issue.

goynov@gmail.com, what device did you use to test it?

According to 805146#51 goynov@ is using Android 5 (Lenovo TB3-710F) and Android 6 (Point of View).

I've failed to reproduce this with Chrome 66.3359.46 on a Nexus 4 (Android 5.1.1) and Nexus 5 (Android 6.0.1).

Tested the issue in Android and able to reproduce the issue. Similar behavior is observed on reported Chrome #66.0.3359.46

Steps Followed:
1. Launched the Chrome Browser.
2. Navigate to the URL: http://code.viget.com/device-motion-demo/
3. Shake the device little bit.
4. Observed that values are not displayed for ".accleration" ".rotationRate", "DeviceOrientation".

Chrome versions tested:
66.0.3359.46(Beta), 67.0.3378.0(Dev & Canary)

OS:
Android 7.0.0

Android Devices:
Samsung J7

This seems to be a Non-Regression issue as same behavior is seen since M60.  Untriaged for further input's on this issue.

Please navigate to below link for log's and screen cast--
go/chrome-androidlogs/824032

Note: 
1. Similar behavior is observed on FireFox.
2. Reported device Lenovo TB3-710F doesn't provide all the sensors as in Pixel, I believe values for the respective components are based on sensors.
3. Specifications URL of Lenovo TB3-710F - https://www.gsmarena.com/lenovo_tab3_7-7951.php
4. Samsung J7 has Accelerometer, proximity only.
5. Issue is not reproduced on reported Chrome #66.0.3359.46 on Pixel Android 8.1

Please let us know if testing on any other device is required.

Thanks!

Tested on Galaxy S4 - everything works fine. It is probably issue with the device sensors of Lenovo and Point of View. Please close the issue. Thank you!

Closing as a non-regression due to hardware issues.