Detect and ban code that triggers compiler bug from PR #3087

[joeyparrish]

In #3087 (comment), I detailed what seems to be a compiler bug. This code in lib/dash/dash_parser.js triggers the bug:

    // Attach trick mode tracks to normal tracks.
    for (const trickModeSet of trickModeAdaptationSets) {
      const targetIds = trickModeSet.trickModeFor.split(' ');
      for (const normalSet of normalAdaptationSets) {
        if (targetIds.includes(normalSet.id)) {
          for (const stream of normalSet.streams) {
            const MimeUtils = shaka.util.MimeUtils;
            // There may be multiple trick mode streams, but we do not
            // currently support that.  Just choose one.
            // TODO: https://github.com/google/shaka-player/issues/1528
            stream.trickModeVideo = trickModeSet.streams.find((trickStream) =>
              MimeUtils.getCodecBase(stream.codecs) ==
              MimeUtils.getCodecBase(trickStream.codecs));
          }
        }
      }
    }

The compiler's iterator polyfill is in play here, as well as an alias which is not directly referenced in scope, but only in a synchronous callback.

Since we can't fix the compiler, and we can't audit the whole codebase for this sort of thing by hand, we need to try to write either an eslint rule or a Closure compiler conformance rule to detect and ban this pattern.