LayoutMenuList::ControlClipRect may depend on size of children

third_party/WebKit/Source/core/layout/LayoutMenuList.cpp

Index: third_party/WebKit/Source/core/layout/LayoutMenuList.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutMenuList.cpp b/third_party/WebKit/Source/core/layout/LayoutMenuList.cpp
index b61f73cdce319771da30e544d7ffba76b093f437..85237ea5739132dd12a305b11674f45de7d65867 100644
--- a/third_party/WebKit/Source/core/layout/LayoutMenuList.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutMenuList.cpp
@@ -124,6 +124,10 @@ void LayoutMenuList::AdjustInnerStyle() {
     inner_style.SetDirection(option_style_->Direction());
     inner_style.SetUnicodeBidi(option_style_->GetUnicodeBidi());
   }
+
+  // LayoutMenuList::ControlClipRect() depends on inner_block_->ContentsSize().
+  if (RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled())
+    SetNeedsPaintPropertyUpdate();
 }
 
 HTMLSelectElement* LayoutMenuList::SelectElement() const {
@@ -137,6 +141,10 @@ void LayoutMenuList::AddChild(LayoutObject* new_child,
 
   if (AXObjectCache* cache = GetDocument().ExistingAXObjectCache())
     cache->ChildrenChanged(this);
+
+  // LayoutMenuList::ControlClipRect() depends on inner_block_->ContentsSize().
+  if (RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled())
+    SetNeedsPaintPropertyUpdate();
 }
 
 void LayoutMenuList::RemoveChild(LayoutObject* old_child) {