[webkit-changes] [WebKit/WebKit] 1e6948: Cherry-pick 6e41546bc076. rdar://problem/103977580

[Tim Horton]

  Branch: refs/heads/safari-7615.1.18-branch
  Home:   https://github.com/WebKit/WebKit
  Commit: 1e6948b8501e660d5610832f642b17cb2ffdaeb0
      https://github.com/WebKit/WebKit/commit/1e6948b8501e660d5610832f642b17cb2ffdaeb0
  Author: Tim Horton <thorton at apple.com>
  Date:   2023-01-09 (Mon, 09 Jan 2023)

  Changed paths:
    M Source/WebKit/UIProcess/API/ios/WKWebViewIOS.mm

  Log Message:
  -----------
  Cherry-pick 6e41546bc076. rdar://problem/103977580

    REGRESSION (258521 at main): Can end up scrolled to an invalid offset, blank space above page
    https://bugs.webkit.org/show_bug.cgi?id=250335
    rdar://103977580

    Reviewed by Dean Jackson and Megan Gardner.

    * Source/WebKit/UIProcess/API/ios/WKWebViewIOS.mm:
    (-[WKWebView _updateScrollViewForTransaction:]):
    Ensure that we don't scroll to an invalid offset, the same way we do elsewhere.

    Canonical link: https://commits.webkit.org/258687@main

Canonical link: https://commits.webkit.org/258608.6@safari-7615.1.18-branch