[webkit-changes] [WebKit/WebKit] ef7734: Cherry-pick 1ffbfef4c616. rdar://problem/108758349

[Antti Koivisto]

  Branch: refs/heads/safari-7615.3.3.12-branch
  Home:   https://github.com/WebKit/WebKit
  Commit: ef77341a03033efc058b84c0af2d7f3902016c37
      https://github.com/WebKit/WebKit/commit/ef77341a03033efc058b84c0af2d7f3902016c37
  Author: Antti Koivisto <antti at apple.com>
  Date:   2023-05-08 (Mon, 08 May 2023)

  Changed paths:
    M Source/WebCore/css/CSSGroupingRule.cpp
    M Source/WebCore/css/CSSStyleSheet.cpp
    M Source/WebCore/css/StyleSheetContents.cpp
    M Source/WebCore/css/StyleSheetContents.h
    M Source/WebCore/css/parser/CSSParserImpl.cpp

  Log Message:
  -----------
  Cherry-pick 1ffbfef4c616. rdar://problem/108758349

    Disallow caching of StyleSheetContents that uses nesting
    https://bugs.webkit.org/show_bug.cgi?id=256449
    rdar://108758349

    Reviewed by Alan Baradlay.

    Mutations to cached document may affect other stylesheets.

    * Source/WebCore/css/CSSGroupingRule.cpp:
    (WebCore::CSSGroupingRule::prepareChildStyleRuleForNesting):
    * Source/WebCore/css/CSSStyleSheet.cpp:
    (WebCore::CSSStyleSheet::prepareChildStyleRuleForNesting):
    * Source/WebCore/css/StyleSheetContents.cpp:
    (WebCore::StyleSheetContents::isCacheable const):
    * Source/WebCore/css/StyleSheetContents.h:
    * Source/WebCore/css/parser/CSSParserImpl.cpp:
    (WebCore::CSSParserImpl::consumeRegularRuleList):
    (WebCore::CSSParserImpl::consumeStyleRule):

    Canonical link: https://commits.webkit.org/263799@main

Identifier: 259548.746 at safari-7615.3.3.12-branch