[Webkit-unassigned] [Bug 160331] Setter on style element's textContent or cssText doesn't trigger style recalc

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=160331

--- Comment #8 from Antti Koivisto <koivisto at iki.fi> ---
The main reason this fails is a simple bug. We don't signal text content mutations to parent in shadow trees:

void CharacterData::dispatchModifiedEvent(const String& oldData)
{
    ...
    if (!isInShadowTree()) {
        if (parentNode()) {
            ...
            parentNode()->childrenChanged(change);
        }

Fixing this makes the page render mostly correctly. Generally we should have a reduced test case available before trying to analyze the cause.

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