1 files changed, 31 insertions, 0 deletions
diff --git a/chromium/cc/layers/scrollbar_layer_base.cc b/chromium/cc/layers/scrollbar_layer_base.cc
new file mode 100644
index 00000000000..14c743b9eb9
--- /dev/null
+++ b/chromium/cc/layers/scrollbar_layer_base.cc
@@ -0,0 +1,31 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "cc/layers/scrollbar_layer_base.h"
+
+#include "cc/layers/scrollbar_layer_impl_base.h"
+
+namespace cc {
+
+ScrollbarLayerBase::ScrollbarLayerBase() {
+  SetIsScrollbar(true);
+}
+
+ScrollbarLayerBase::~ScrollbarLayerBase() = default;
+
+void ScrollbarLayerBase::SetScrollElementId(ElementId element_id) {
+  if (element_id == scroll_element_id_)
+    return;
+
+  scroll_element_id_ = element_id;
+  SetNeedsCommit();
+}
+
+void ScrollbarLayerBase::PushPropertiesTo(LayerImpl* layer) {
+  Layer::PushPropertiesTo(layer);
+  static_cast<ScrollbarLayerImplBase*>(layer)->SetScrollElementId(
+      scroll_element_id_);
+}
+
+}  // namespace cc