[Webkit-unassigned] [Bug 63688] New: Refactoring: ExceptionCode value which never become non-zero should be replaced with NeverThrown

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=63688

           Summary: Refactoring: ExceptionCode value which never become
                    non-zero should be replaced with NeverThrown
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: morrita at google.com


This refactoring will introduce a temporal object which replaces
our tedious pattern like this:

ExceptionCode ec = 0;
weKnowThisNeverFail(ec);
ASSERT(!ec);

We can have a helper class like this:
weKnowThisNeverFail(NeverThrown());

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