ash: Remove unnecessary utility methods from ash::Shelf

ash/shelf/shelf_widget.cc

Index: ash/shelf/shelf_widget.cc
diff --git a/ash/shelf/shelf_widget.cc b/ash/shelf/shelf_widget.cc
index 4b0d9c012ca00ff071fb0f15f7b75d7c570ac4ec..5cda976831979434aeda2635ab3bdf0c79769167 100644
--- a/ash/shelf/shelf_widget.cc
+++ b/ash/shelf/shelf_widget.cc
@@ -458,6 +458,14 @@ void ShelfWidget::SetShelfVisibility(bool visible) {
     shelf_view_->SetVisible(visible);
 }
 
+bool ShelfWidget::IsShowingContextMenu() const {
+  return shelf_view_ && shelf_view_->IsShowingMenu();
+}
+
+bool ShelfWidget::IsShowingOverflowBubble() const {
+  return shelf_view_ && shelf_view_->IsShowingOverflowBubble();
+}
+
 void ShelfWidget::SetFocusCycler(FocusCycler* focus_cycler) {
   delegate_view_->set_focus_cycler(focus_cycler);
   if (focus_cycler)