Meta: fix realm issues in reference implementation testing setup #957
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By bundling together the reference implementation using browserify, then evaluating it inside the wpt-runner window context, we fix all the cross-realm issues that have plagued us. This includes promise assimilation (which we had a workaround in place for), as well as Object.prototype identity (came up when testing async iterators) and the presence of DOMException and AbortSignal on the global (came up when testing #744).
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By bundling together the reference implementation using browserify, then evaluating it inside the wpt-runner window context, we fix all the cross-realm issues that have plagued us. This includes promise assimilation (which we had a workaround in place for), as well as Object.prototype identity (came up when testing async iterators) and the presence of DOMException and AbortSignal on the global (came up when testing #744).