cros: Fix DeskNameView ChromeVox behavior.

Currently, the ChromeVox behavior is broken. It doesn't echo typed text,
nor does it read out typed text.

This CL fixes ChromeVox behavior by calling
Textfield::GetAccessibleNodeData() in
DeskNameView::GetAccessibleNodeData().

Test: manual
Bug: 1166732, 1166693
Change-Id: I54306c8b3ea02000aef7663ace32ffd314d5c235
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2632045Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Commit-Queue: Jeremy Chinsen <chinsenj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844118}

ash/wm/desks/desk_name_view.cc

@@ -117,7 +117,7 @@ bool DeskNameView::SkipDefaultKeyEventProcessing(const ui::KeyEvent& event) {
 }
 
 void DeskNameView::GetAccessibleNodeData(ui::AXNodeData* node_data) {
-  node_data->role = ax::mojom::Role::kTextField;
+  Textfield::GetAccessibleNodeData(node_data);
   // When Bento is enabled and the user creates a new desk, |full_text_| will be
   // empty but the accesssible name for |this| will be the default desk name.
   node_data->SetName(full_text_.empty() ? GetAccessibleName() : full_text_);