When a loaded DASH manifest is invalid (either some periods were removed
illegally, or a manifest for a live event is stale), we will retry using 1
logic:
- Retry loading with back-off up-to a limit.
- Throw a DashManifestExpiredException() if we exceed retry limit.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=182770028
