Add WARN_UNUSED_RETURN to decode methods in Source/WebKit.
$ ./Tools/Scripts/check-webkit-style --filter=-,+security/missing_warn_unused_return Source/WebKit
NOTE: Not every change is relate to CoreIPC decoding, but they're all decode methods that return bool.
Also found a couple platformDecode() methods, so will update check-webkit-style.
Note: No issues were found. This is to add WARN_UNUSED_RETURN to decode methods returning `bool` to prevent future bugs.
Created attachment 396273 [details]
Committed r260025: <https://trac.webkit.org/changeset/260025>
All reviewed patches have been landed. Closing bug and clearing flags on attachment 396273 [details].