mash: Preliminary support for shelf auto-hide

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 dc70ba56270a0d8e968ae927e56778fdae1a230f..ac42335fd08f3c26b5ec087703eff0976cdd9234 100644
--- a/ash/shelf/shelf_widget.cc
+++ b/ash/shelf/shelf_widget.cc
@@ -798,4 +798,16 @@ void ShelfWidget::DisableDimmingAnimationsForTest() {
   return delegate_view_->disable_dimming_animations_for_test();
 }
 
+void ShelfWidget::OnMouseEvent(ui::MouseEvent* event) {
+  Widget::OnMouseEvent(event);
+  if (Shell::GetInstance()->in_mus() && shelf_layout_manager_)
+    shelf_layout_manager_->UpdateAutoHideForMouseEvent(event);
+}
+
+void ShelfWidget::OnGestureEvent(ui::GestureEvent* event) {
+  Widget::OnGestureEvent(event);
+  if (Shell::GetInstance()->in_mus() && shelf_layout_manager_)
+    shelf_layout_manager_->UpdateAutoHideForGestureEvent(event);
+}
+
 }  // namespace ash