Bug 161133

Summary:	Make RenderMathToken::m_mathVariantGlyph an Optional<GlyphData> to encode its dirtiness
Product:	WebKit	Reporter:	Frédéric Wang (:fredw) <fred.wang>
Component:	MathML	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal
Priority:	P2
Version:	WebKit Nightly Build
Hardware:	All
OS:	All

Description Frédéric Wang (:fredw) 2016-08-24 03:00:09 PDT

The glyph to draw special mathvariant is handled via two members:

GlyphData m_mathVariantGlyph;
bool m_mathVariantGlyphDirty;

They should be merged into a single Optional<GlyphData> where Nullopt means that the glyph is dirty.