fontSelector should be reset when removing stylesheets which has @font-face rule.

Source/core/dom/ShadowTreeStyleSheetCollection.cpp

Index: Source/core/dom/ShadowTreeStyleSheetCollection.cpp
diff --git a/Source/core/dom/ShadowTreeStyleSheetCollection.cpp b/Source/core/dom/ShadowTreeStyleSheetCollection.cpp
index f77ff81e064f0ef3aa587d6021185e834b1cecb4..5e4d7c77188c93b59a2ea1e03473b3e46d4aad66 100644
--- a/Source/core/dom/ShadowTreeStyleSheetCollection.cpp
+++ b/Source/core/dom/ShadowTreeStyleSheetCollection.cpp
@@ -101,9 +101,10 @@ bool ShadowTreeStyleSheetCollection::updateActiveStyleSheets(StyleEngine* collec
     collectStyleSheets(collections, styleSheets, activeCSSStyleSheets);
 
     bool requiresFullStyleRecalc = true;
+    bool requiresResetFontSelector = false;
 
     StyleResolverUpdateType styleResolverUpdateType;
-    analyzeStyleSheetChange(updateMode, activeAuthorStyleSheets(), activeCSSStyleSheets, styleResolverUpdateType, requiresFullStyleRecalc);
+    analyzeStyleSheetChange(updateMode, activeAuthorStyleSheets(), activeCSSStyleSheets, styleResolverUpdateType, requiresFullStyleRecalc, requiresResetFontSelector);
 
     if (StyleResolver* styleResolver = document()->styleResolverIfExists()) {
         // FIXME: We might have already had styles in child treescope. In this case, we cannot use buildScopedStyleTreeInDocumentOrder.