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1. Token CRCs are not handled correctly. This adds the corrected Whispernet binary (from cl/87383487), and a test to confirm the correct behavior.

2. If we get tokens that require more than one padding character, the padding will not be completely removed when appropriate. This is a simple change in the js.

BUG=463218

Review URL: https://codereview.chromium.org/969843002

Cr-Commit-Position: refs/heads/master@{#319015}