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 e181fec6ba36672aa91be6fdc8530a8ebc71d495..f3a3c4f79b2961b8fb70fa16fd5fff762fac6084 100644
--- a/Source/core/dom/StyleSheetCollection.h
+++ b/Source/core/dom/StyleSheetCollection.h
@@ -49,6 +49,7 @@ class Node;
 class StyleSheet;
 class StyleSheetContents;
 class StyleSheetList;
+class StyleRuleFontFace;
 
 // FIXME: Should be in separate file and be renamed like:
 // - StyleSheetCollectionBase -> StyleSheetCollection
@@ -104,13 +105,13 @@ protected:
     enum StyleResolverUpdateType {
         Reconstruct,
         Reset,
-        Additive,
-        ResetStyleResolverAndFontSelector
+        Additive
     };
 
     struct StyleSheetChange {
         StyleResolverUpdateType styleResolverUpdateType;
         bool requiresFullStyleRecalc;
+        Vector<const StyleRuleFontFace*> fontFaceRulesToRemove;
 
         StyleSheetChange()
             : styleResolverUpdateType(Reconstruct)