[Webkit-unassigned] [Bug 133159] New: viewStateDidChange should always fully update ViewState

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=133159

           Summary: viewStateDidChange should always fully update
                    ViewState
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: barraclough at apple.com


Currently WebPageProxy::viewStateDidChange is passed a mask of bits to update.

This has the following negative consequences:
 – WKWebView implicitly requires more detailed knowledge of the internal implementation of the PageClient.
 – Updates may unnecessarily be split over multiple IPC messages.
 – In order to support partial updates we make multiple virtual function calls to PageClient, which then makes duplicate objc calls.

Better to just always update the entire ViewState.

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