GitLab

If a CDM calls the wrong Resolved() method to resolve a promise, the
promise is cast to the wrong type and causes a crash. This fixes the
problem by verifying that the promise is the correct type before
casting it.

BUG=408319
TEST=existing EME tests pass

Review URL: https://codereview.chromium.org/515753002

Cr-Commit-Position: refs/heads/master@{#292440}