Revert of Remove DialogDelegate::OnClosed() which is redundant with

chrome/browser/ui/views/sync/profile_signin_confirmation_dialog_views.cc

Index: chrome/browser/ui/views/sync/profile_signin_confirmation_dialog_views.cc
diff --git a/chrome/browser/ui/views/sync/profile_signin_confirmation_dialog_views.cc b/chrome/browser/ui/views/sync/profile_signin_confirmation_dialog_views.cc
index cc9f3edec26d3092ac9cbcdffdacadc2c0aefc74..28a8fafd68a63d1fae1271e2a24069adeab960a1 100644
--- a/chrome/browser/ui/views/sync/profile_signin_confirmation_dialog_views.cc
+++ b/chrome/browser/ui/views/sync/profile_signin_confirmation_dialog_views.cc
@@ -134,6 +134,10 @@
   return true;
 }
 
+void ProfileSigninConfirmationDialogViews::OnClosed() {
+  Cancel();
+}
+
 ui::ModalType ProfileSigninConfirmationDialogViews::GetModalType() const {
   return ui::MODAL_TYPE_WINDOW;
 }
@@ -226,10 +230,6 @@
       kPreferredWidth, explanation_label_->GetHeightForWidth(kPreferredWidth));
 }
 
-void ProfileSigninConfirmationDialogViews::WindowClosing() {
-  Cancel();
-}
-
 void ProfileSigninConfirmationDialogViews::StyledLabelLinkClicked(
     views::StyledLabel* label,
     const gfx::Range& range,