mac: Prepare for -Wunused-functions.

chrome/browser/extensions/extension_toolbar_model.cc

Index: chrome/browser/extensions/extension_toolbar_model.cc
diff --git a/chrome/browser/extensions/extension_toolbar_model.cc b/chrome/browser/extensions/extension_toolbar_model.cc
index 34049e08100a407dbf51067cef2a2bd39d0cd612..ca78afa51b1f7051bfcd9a01923f72ff3496f738 100644
--- a/chrome/browser/extensions/extension_toolbar_model.cc
+++ b/chrome/browser/extensions/extension_toolbar_model.cc
@@ -30,20 +30,6 @@ using extensions::Extension;
 using extensions::ExtensionIdList;
 using extensions::ExtensionList;
 
-namespace {
-
-// Returns true if an |extension| is in an |extension_list|.
-bool IsInExtensionList(const Extension* extension,
-                       const extensions::ExtensionList& extension_list) {
-  for (size_t i = 0; i < extension_list.size(); i++) {
-    if (extension_list[i].get() == extension)
-      return true;
-  }
-  return false;
-}
-
-}  // namespace
-
 bool ExtensionToolbarModel::Observer::BrowserActionShowPopup(
     const extensions::Extension* extension) {
   return false;