Revert "Revert "Reland 2: mac: Use a placeholder string for the family name of the system font." Br…

Source/core/layout/LayoutTheme.h

Index: Source/core/layout/LayoutTheme.h
diff --git a/Source/core/layout/LayoutTheme.h b/Source/core/layout/LayoutTheme.h
index e0bfb5dd96fd8d8707a9e6f053226aad1b2cfef5..67d6fc8c71974093f53ff7aad61eb1b4df1d4687 100644
--- a/Source/core/layout/LayoutTheme.h
+++ b/Source/core/layout/LayoutTheme.h
@@ -136,6 +136,10 @@ public:
     void systemFont(CSSValueID systemFontID, FontDescription&);
     virtual Color systemColor(CSSValueID) const;
 
+    // Whether the default system font should have its average character width
+    // adjusted to match MS Shell Dlg.
+    virtual bool needsHackForTextControlWithFontFamily(const AtomicString&) const { return false; }
+
     virtual int minimumMenuListSize(const ComputedStyle&) const { return 0; }
 
     virtual void adjustSliderThumbSize(ComputedStyle&) const;