[Manishram-ai]

Summary

WebView Android doesn't expose the Device Posture API, so this sets webview_android to false for api.Navigator.devicePosture and api.DevicePosture (and its type and change_event) instead of mirroring Chrome.

Test results and supporting details

Chromium turns the API off for WebView in aw_field_trials.cc:

// Disable device posture API as the framework implementation causes
// AwContents to leak in apps that don't call destroy().
aw_feature_overrides.DisableFeature(blink::features::kDevicePosture);

That line landed in May 2024 (CL 5548161, crbug.com/335314107), before Chrome 132 shipped the API, so WebView never had it. This matches the test in #30973: 'devicePosture' in navigator is false in WebView 155 and true in Chrome on the same phone.

I left the device-posture media feature as it is, since #30973 shows it working in WebView.

The same Chromium change also turns off kViewportSegments, so api.Viewport.segments may have the same problem in WebView. I haven't tested that one.

Related issues

Fixes #30973

[github-actions]

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[Elchi3]

Thank you! 👍