chrome: Remove unused definition of ShowInstantConfirmDialog().

chrome/browser/app_controller_mac.mm

Index: chrome/browser/app_controller_mac.mm
diff --git a/chrome/browser/app_controller_mac.mm b/chrome/browser/app_controller_mac.mm
index 21037dfc2ba61f2055c9335fa68e695a0c9d0aed..2cc8390aadc49d9f281728665841595d4b578960 100644
--- a/chrome/browser/app_controller_mac.mm
+++ b/chrome/browser/app_controller_mac.mm
@@ -1295,18 +1295,6 @@ const AEEventClass kAECloudPrintUninstallClass = 'GCPu';
 
 //---------------------------------------------------------------------------
 
-namespace browser {
-
-void ShowInstantConfirmDialog(gfx::NativeWindow parent, Profile* profile) {
-  if (Browser* browser = ActivateBrowser(profile)) {
-    chrome::ShowInstantConfirmDialog(browser);
-  } else {
-    chrome::OpenInstantConfirmDialogWindow(profile);
-  }
-}
-
-}  // namespace browser
-
 namespace app_controller_mac {
 
 bool IsOpeningNewWindow() {