WebGLShadowMap: Ensure to use the latest reference to WebGLObjects. #21452
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Related issue: Fixed #17161.
Description
This PR ensures that
WebGLShadowMap
does not use an outdated version ofWebGLObjects
when a context loss happens.Compared to the earlier PR, this one keeps
initGLContext()
clean. Public properties of the renderer's API are now restored where it's supposed to happen ( inonContextRestore()
).