Changed AppListDialogContentsView to extend DialogDelegate

ui/views/widget/widget_delegate.cc

Index: ui/views/widget/widget_delegate.cc
diff --git a/ui/views/widget/widget_delegate.cc b/ui/views/widget/widget_delegate.cc
index 7e1f67e19c3bdfddfcd5917ba409016d83505692..835af62229c076d102c95a6f33425e97610dec75 100644
--- a/ui/views/widget/widget_delegate.cc
+++ b/ui/views/widget/widget_delegate.cc
@@ -59,6 +59,12 @@ ui::ModalType WidgetDelegate::GetModalType() const {
   return ui::MODAL_TYPE_NONE;
 }
 
+bool WidgetDelegate::IsDialogBox() {
+  // TODO(sashab): Return false by default here, and add an override to all

[tapted, 2014/07/21 00:34:07]

I think this CL is small enough to do this now  - pretty sure just
dialog_delegate.h/cc needs to change.

[sashab, 2014/07/21 03:36:21]

Oh, I didn't think of that, for some reason :) Done.

+  // DialogDelegate children to return true.
+  return !!AsDialogDelegate();
+}
+
 ui::AXRole WidgetDelegate::GetAccessibleWindowRole() const {
   return ui::AX_ROLE_WINDOW;
 }