[Mac] Handle shift-delete when omnibox popup is up.

chrome/browser/autocomplete/autocomplete_edit_view_mac.h

Index: chrome/browser/autocomplete/autocomplete_edit_view_mac.h
diff --git a/chrome/browser/autocomplete/autocomplete_edit_view_mac.h b/chrome/browser/autocomplete/autocomplete_edit_view_mac.h
index e3c63722885926e6daca711f44d09e953c8b2495..dd71e19ab3773890f59669d771781ad8c51be046 100644
--- a/chrome/browser/autocomplete/autocomplete_edit_view_mac.h
+++ b/chrome/browser/autocomplete/autocomplete_edit_view_mac.h
@@ -122,6 +122,10 @@ class AutocompleteEditViewMac : public AutocompleteEditView {
   // machinery).
   bool OnBackspacePressed();
 
+  // Forward to same method in |popup_view_| model.  Used when
+  // Shift-Delete is pressed, to delete items from the popup.
+  void TryDeletingCurrentItem();
+
   void AcceptInput(WindowOpenDisposition disposition, bool for_drop);
 
   // Helper for LocationBarViewMac.  Selects all in |field_|.