This is just what appears to be a typo in the WebGL driver that is deleting the mapping between a uint32 ID and a
JavaScript value for vertexArrays from the value store for the textures instead. This seems like it would potentially
cause a crash if the numbers aligned.
These function return true in most cases, and when these return false,
the situation is pretty bad and recovering the situation would not be
possible.
IsFramebuffer and IsRenderbuffer cause round trips and affect performance.
Let's remove them.
