[Webkit-unassigned] [Bug 189805] New: [MSE] Fix comparsion with uninitialized greatestDecodeDuration

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=189805

            Bug ID: 189805
           Summary: [MSE] Fix comparsion with uninitialized
                    greatestDecodeDuration
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aboya at igalia.com

greatestDecodeDuration was being compared without being set to a valid value before... which resulted in it never being set to valid value... which resulted in distant appends being considered as part of the same coded frame group... which resulted in unwanted frame deletion for frames in the middle... which resulted in the `Append*OutOfOrder` YouTube TV tests failing (and likely seeks resembling the same sequence of appends failing too).

This patch fixes that issue and adds a mock test to ensure it does not happen again.

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