[Webkit-unassigned] [Bug 200137] Replace FileSystem::MappedFileData success parameter with returning Optional

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=200137

--- Comment #1 from Christopher Reid <chris.reid at sony.com> ---
Created attachment 374905

  --> https://bugs.webkit.org/attachment.cgi?id=374905&action=review

Patch

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