[Webkit-unassigned] [Bug 115755] New: Devirtualize Document class type checking

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=115755

           Summary: Devirtualize Document class type checking
           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: rniwa at webkit.org
                CC: koivisto at iki.fi, benjamin at webkit.org, akling at apple.com


Merge
https://chromium.googlesource.com/chromium/blink/+/dae5adc768d5ce6bff301df6515745da8ea24950
Devirtualize Document class type checking

Document has a bunch of virtual bool is*Document() methods on it, but it also has
two bools for XHTML and HTML documents which is silly. We can merge them all
together into an enum of values and devirtualize the type checking methods.

This patch introduces the DocumentClass enum that is used to signal what subclass
of Document, or HTMLDocument, is being implemented.

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