Update from https://crrev.com/306655

cc/blink/web_compositor_support_impl.cc

Index: cc/blink/web_compositor_support_impl.cc
diff --git a/cc/blink/web_compositor_support_impl.cc b/cc/blink/web_compositor_support_impl.cc
index ae098fc867e462745793964258dc2c162e9fc5af..042908ccbac5e9b93cc9bca179a9b0278eaac64e 100644
--- a/cc/blink/web_compositor_support_impl.cc
+++ b/cc/blink/web_compositor_support_impl.cc
@@ -9,6 +9,7 @@
 #include "cc/animation/transform_operations.h"
 #include "cc/blink/web_animation_impl.h"
 #include "cc/blink/web_content_layer_impl.h"
+#include "cc/blink/web_display_item_list_impl.h"
 #include "cc/blink/web_external_texture_layer_impl.h"
 #include "cc/blink/web_filter_animation_curve_impl.h"
 #include "cc/blink/web_filter_operations_impl.h"
@@ -27,6 +28,9 @@ using blink::WebCompositorAnimation;
 using blink::WebCompositorAnimationCurve;
 using blink::WebContentLayer;
 using blink::WebContentLayerClient;
+#if WEB_DISPLAY_ITEM_LIST_IS_DEFINED
+using blink::WebDisplayItemList;
+#endif
 using blink::WebExternalTextureLayer;
 using blink::WebExternalTextureLayerClient;
 using blink::WebFilterAnimationCurve;
@@ -91,6 +95,12 @@ WebScrollbarLayer* WebCompositorSupportImpl::createSolidColorScrollbarLayer(
                                    is_left_side_vertical_scrollbar);
 }
 
+#if WEB_DISPLAY_ITEM_LIST_IS_DEFINED
+WebDisplayItemList* WebCompositorSupportImpl::createDisplayItemList() {
+  return new WebDisplayItemListImpl();
+}
+#endif
+
 WebCompositorAnimation* WebCompositorSupportImpl::createAnimation(
     const blink::WebCompositorAnimationCurve& curve,
     blink::WebCompositorAnimation::TargetProperty target,