Minor infobar cleanup.

chrome/browser/content_settings/permission_infobar_delegate.h

Index: chrome/browser/content_settings/permission_infobar_delegate.h
diff --git a/chrome/browser/content_settings/permission_infobar_delegate.h b/chrome/browser/content_settings/permission_infobar_delegate.h
index 1789058b3a2b56f9030a6623d82116b574ecfc76..2f238b89832a4bd06061ba8b7608446bc2979c10 100644
--- a/chrome/browser/content_settings/permission_infobar_delegate.h
+++ b/chrome/browser/content_settings/permission_infobar_delegate.h
@@ -27,19 +27,14 @@ class PermissionInfobarDelegate : public ConfirmInfoBarDelegate {
                             ContentSettingsType type);
   ~PermissionInfobarDelegate() override;
 
+ private:
   // ConfirmInfoBarDelegate:
-  base::string16 GetMessageText() const override = 0;
-
-  infobars::InfoBarDelegate::Type GetInfoBarType() const override;
-  base::string16 GetButtonLabel(InfoBarButton button) const override;
-
-  // Remember to call RegisterActionTaken for these methods if you are
-  // overriding them.
+  Type GetInfoBarType() const override;
   void InfoBarDismissed() override;
+  base::string16 GetButtonLabel(InfoBarButton button) const override;
   bool Accept() override;
   bool Cancel() override;
 
- private:
   void SetPermission(bool update_content_setting, bool allowed);
 
   PermissionQueueController* controller_; // not owned by us