Use removeFontFace to avoid resetting fontSelector.

Source/core/frame/Settings.h

Index: Source/core/frame/Settings.h
diff --git a/Source/core/frame/Settings.h b/Source/core/frame/Settings.h
index 76f5ac5097f6f27694fd84a4fe0cce2853601043..dd1ae0ece914e6c1c459851eb21b07fa341b83f7 100644
--- a/Source/core/frame/Settings.h
+++ b/Source/core/frame/Settings.h
@@ -55,6 +55,13 @@ public:
     static PassOwnPtr<Settings> create();
 
     GenericFontFamilySettings& genericFontFamilySettings() { return m_genericFontFamilySettings; }
+    void setCursiveFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
+    void setFantasyFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
+    void setFixedFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
+    void setPictographFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
+    void setSansSerifFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
+    void setSerifFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
+    void setStandardFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
 
     void setTextAutosizingEnabled(bool);
     bool textAutosizingEnabled() const;
@@ -92,6 +99,7 @@ private:
     Settings();
 
     void invalidate(SettingsDelegate::ChangeType);
+    void notifyFontFamilySettingsChanged();
 
     // FIXME: pageOfShame() is a hack for the inspector code:
     // http://crbug.com/327476