Use removeFontFace to avoid resetting fontSelector.

Source/core/dom/StyleSheetCollection.h

Index: Source/core/dom/StyleSheetCollection.h
diff --git a/Source/core/dom/StyleSheetCollection.h b/Source/core/dom/StyleSheetCollection.h
index eddab7c451539ced7b86d4ea8deb640796cd6471..561fa3b58fc22d8399c2af32eeecaac14eab25a2 100644
--- a/Source/core/dom/StyleSheetCollection.h
+++ b/Source/core/dom/StyleSheetCollection.h
@@ -48,6 +48,7 @@ class Node;
 class StyleSheet;
 class StyleSheetContents;
 class StyleSheetList;
+class StyleRuleFontFace;
 
 // FIXME: Should be in separate file and be renamed like:
 // - StyleSheetCollectionBase -> StyleSheetCollection
@@ -99,13 +100,13 @@ protected:
     enum StyleResolverUpdateType {
         Reconstruct,
         Reset,
-        Additive,
-        ResetStyleResolverAndFontSelector
+        Additive
     };
 
     struct StyleSheetChange {
         StyleResolverUpdateType styleResolverUpdateType;
         bool requiresFullStyleRecalc;
+        Vector<const StyleRuleFontFace*> fontFaceRulesToRemove;
 
         StyleSheetChange()
             : styleResolverUpdateType(Reconstruct)