Use removeFontFace to avoid resetting fontSelector.

Source/core/dom/TreeScopeStyleSheetCollection.h

Index: Source/core/dom/TreeScopeStyleSheetCollection.h
diff --git a/Source/core/dom/TreeScopeStyleSheetCollection.h b/Source/core/dom/TreeScopeStyleSheetCollection.h
index fc4348e6a4c3e1d22276d91d150738c977604e4f..6d24219c119b43ee0323e5406bd641f172dd51b8 100644
--- a/Source/core/dom/TreeScopeStyleSheetCollection.h
+++ b/Source/core/dom/TreeScopeStyleSheetCollection.h
@@ -48,6 +48,7 @@ class StyleEngine;
 class Node;
 class StyleSheetContents;
 class StyleSheetList;
+class StyleRuleFontFace;
 
 class TreeScopeStyleSheetCollection : public StyleSheetCollection {
 public:
@@ -72,13 +73,13 @@ protected:
     enum StyleResolverUpdateType {
         Reconstruct,
         Reset,
-        Additive,
-        ResetStyleResolverAndFontSelector
+        Additive
     };
 
     struct StyleSheetChange {
         StyleResolverUpdateType styleResolverUpdateType;
         bool requiresFullStyleRecalc;
+        Vector<const StyleRuleFontFace*> fontFaceRulesToRemove;
 
         StyleSheetChange()
             : styleResolverUpdateType(Reconstruct)