Fix //third_party/cec to not disable -Wunused-function.

chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.mm

Index: chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.mm
diff --git a/chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.mm b/chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.mm
index 7e89c21686acbe789e1557a24239113c315295ee..449e4f0075a8d94eb51fde4ff1e3fae1b46de0f8 100644
--- a/chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.mm
+++ b/chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.mm
@@ -100,9 +100,6 @@ NSFont* LargeSuperscriptFont() {
   NSFontDescriptor* descriptor = [font fontDescriptor];
   return [NSFont fontWithDescriptor:descriptor size:size];
 }
-NSFont* SmallFont() {
-  return OmniboxViewMac::GetSmallFont();
-}
 
 // Sets the writing direction to |direction| for a given |range| of
 // |attributedString|.