Remove DialogDelegate::OnClosed() which is redundant with

ui/views/window/dialog_client_view.cc

Index: ui/views/window/dialog_client_view.cc
diff --git a/ui/views/window/dialog_client_view.cc b/ui/views/window/dialog_client_view.cc
index 569944542f94a7623b6c4c9f96f84cc393728a72..f9a30f9a3eaf037391af398a386758ce65da0502 100644
--- a/ui/views/window/dialog_client_view.cc
+++ b/ui/views/window/dialog_client_view.cc
@@ -129,7 +129,6 @@ bool DialogClientView::CanClose() {
   // before: it's a Close action.
   if (GetDialogDelegate()->Close()) {
     notified_delegate_ = true;

[vasilii, 2016/02/11 10:37:48]

I suspect that you can drop |notified_delegate_|

[Evan Stade, 2016/02/11 20:02:11]

done. I can't repro the original bug on linux because holding space immediately
closes the js dialog. Is this a windows-specific thing? Would be nice to verify
this doesn't regress that case.

-    GetDialogDelegate()->OnClosed();
     return true;
   }
   return false;
@@ -377,7 +376,6 @@ gfx::Insets DialogClientView::GetButtonRowInsets() const {
 
 void DialogClientView::Close() {
   GetWidget()->Close();
-  GetDialogDelegate()->OnClosed();
 }
 
 }  // namespace views