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 9c9023355ab0cefdf9a7596df7b225c655ea92e7..6571b7b63b692a78b6fe760d9bdc8722a8038f22 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
@@ -98,13 +99,13 @@ protected:
     enum StyleResolverUpdateType {
         Reconstruct,
         Reset,
-        Additive,
-        ResetStyleResolverAndFontSelector
+        Additive
     };
 
     struct StyleSheetChange {
         StyleResolverUpdateType styleResolverUpdateType;
         bool requiresFullStyleRecalc;
+        Vector<const StyleRuleFontFace*> fontFaceRulesToRemove;
 
         StyleSheetChange()
             : styleResolverUpdateType(Reconstruct)